Yarn-dyed cotton herringbone throws with striped borders stacked beside a weaving loom, showing woven selvedges, end-fringe grouping and inspection under white light

Start with the mass basis: what 320gsm actually covers

For woven hotel throws, the first dispute is often not colour or fringe. It is what the stated 320gsm applies to. Buyers should write this explicitly: 320gsm refers to the finished body fabric area only, excluding fringe, sewing thread, labels, belly bands and packaging. If that point is left vague, suppliers may quote against different measurement bases and unit weights stop being comparable.

A practical PO line is: finished body fabric mass 320gsm ±5%, tested from conditioned finished article, commercial weight calculated on body area excluding fringe; fringe weight included in net piece weight. For woven made-up articles, mass per unit area can be checked to ASTM D3776 or ISO 3801 after conditioning to ISO 139. To avoid lab-to-lab variation, specify that specimens are cut from the finished body zone only, with fringe fully removed or excluded, and not from border transitions or selvedge distortion zones unless those are intentionally part of the claim.

If the article is already made up, the cleanest method is to measure the finished body dimensions flat without tension, exclude fringe from length, and either: 1) calculate commercial GSM from conditioned net body weight divided by body area, or 2) cut standard lab swatches from representative body panels away from the fringe line and selvedges. Write which method governs if results differ. That stops one lab weighing the whole throw while another cuts only the centre field.

Use both a GSM target and an expected net piece-weight range. Example: if the construction is a 320gsm body with 6cm finished end fringe at both short ends, the gross textile weight will be higher than a simple area calculation. If the factory only states one headline piece weight without defining the basis, costing and claim handling become difficult at shipment stage.

Broadly standard: GSM basis, body-size definition, conditioning atmosphere and specimen location must be specified. Negotiable by supplier: exact tolerance window, specimen size, and how many pieces per lot are checked for commercial weight.

For broader comparison between woven cotton and fleece formats, see fleece and woven cotton blanket fabric trade-offs.

Worked weight calculations for common hotel sizes

Use commercial body size excluding fringe for GSM calculations, then add a fringe allowance. Measure body size on the finished article laid flat without tension after the agreed finish route. Keep two concepts separate: manufacturing allowance built into weaving and finishing to hit the sold size, and post-wash dimensional change accepted on the final article. They are not the same number.

125x150cm finished body: body area = 1.25 x 1.50 = 1.875m². At 320gsm, body weight = 600g. Add fringe allowance typically 20-35g if 6cm end fringe is used on both short sides. Expected net textile weight: 620-635g. Heavier plied yarn, deeper fringe or tighter twisting may push this toward 640g.

130x170cm finished body: body area = 1.30 x 1.70 = 2.21m². At 320gsm, body weight = 707g. Add fringe allowance typically 25-40g. Expected net textile weight: 732-747g. For freight and carton planning, many buyers round this to about 0.74kg net textile weight.

140x180cm finished body: body area = 1.40 x 1.80 = 2.52m². At 320gsm, body weight = 806g. Add fringe allowance typically 30-45g. Expected net textile weight: 836-851g. For logistics planning, it is safer to cost near 0.85kg net textile weight than 0.80kg.

If you prefer the commercial size to include fringe, write that separately. Example: finished body 130x170cm excluding fringe; overall length approx. 182cm including 6cm fringe at each end. That avoids one supplier quoting 170cm body plus fringe while another quotes 170cm overall.

For larger woven picnic formats where weight planning and loom width interact differently, see loom width planning for yarn-dyed cotton picnic blankets.

How to estimate fringe weight instead of guessing

Fringe weight can be estimated well enough for costing if you know the yarn count, fringe depth and number of warp ends released into the fringe. A simple buyer formula is: fringe weight per piece ≈ total fringe yarn length x yarn linear density. For cotton yarn quoted in English cotton count Ne, convert approximately to tex with tex ≈ 590.5 / Ne for singles. For plied yarn, multiply by the ply count. Example: 16/2 Ne means two plies of Ne 16, giving about 74 tex total yarn linear density.

Worked example for a 130x170cm throw with end fringe only: finished body width = 130cm = 51.18in. If the effective end density is 58 ends per inch, then theoretical warp ends across width = 51.18 x 58 = 2968 ends. In practice, mills may round this slightly depending on design width, border zoning and whether selvedge ends are included or excluded. A PO should state which convention is used. Using 2968 ends as the working figure, and 6cm fringe at each short end, extra released yarn length per end thread is 0.12m total. Total fringe yarn length is therefore about 2968 x 0.12 = 356.2m. At 74 tex, estimated fringe yarn weight is 356.2 x 74 / 1000 = 26.4g before trimming loss and twist take-up.

If the fringe is twisted or knotted, the commercial allowance should be a little higher than the theoretical straight-yarn figure. A practical allowance in this example is often 27-32g depending on bundle size, twist turns, knotting method and trimming waste. Very deep fringe, such as 8-10cm, adds visible weight quickly and should not be left to visual estimation.

This is still an estimate, not a substitute for bulk pre-production weighing. Broadly standard: define fringe depth and fringe method. Negotiable by supplier: exact grouping count, twist turns, selvedge inclusion convention and finishing route. Bulk approvals should be based on actual weighed pilot pieces after finishing, not only yarn math.

Construction details buyers should request in every RFQ

If the RFQ only says '320gsm cotton herringbone throw', comparisons between mills are weak. Ask for the woven construction using consistent yarn language. For this product class, commercial builds are often based on English cotton count Ne ring-spun cotton yarns in plied construction, for example Ne 16/2, Ne 20/2 or Ne 12/2. Write clearly whether the count is singles or plied; '16s cotton' is too vague.

A common starting window for a hotel-grade article is warp Ne 16/2 to 20/2, weft Ne 12/2 to 16/2, usually ring-spun carded or combed cotton. Combed yarn generally gives a cleaner face and better fringe behaviour, but at higher cost. Twist for ring-spun plied yarns may often land around 500-700 TPM per final plied yarn, but this is illustrative only and mill dependent. Lower effective twist usually improves softness, but can raise fuzz, edge hairiness and fringe shedding.

Density matters as much as yarn count. Constructions that finish near 320gsm may sit roughly around 42-58 EPI and 28-42 PPI, depending on yarn size, herringbone repeat, loom width, crimp take-up, finish loss, compacting, softening route and border motif coverage. These are working RFQ windows, not normative ranges. A style at 320gsm can sit outside them and still be correct if the mill's build, yarn quality and finish route support it.

The herringbone itself should be defined. A practical PO note is: 2/2 or 3/1 twill-based herringbone, visual repeat 8-20mm per chevron leg. Smaller repeats read cleaner and more tailored; larger repeats read more casual and show distortion more easily if warp and weft shrinkage are unbalanced. If stripe borders sit beside the herringbone field, ask the supplier to state whether the border zone is woven on the same dobby plan or inserted as a separate stripe section.

Also request selvedge and edge details: long sides as woven selvedge or turned hem or lockstitched edge; short ends as drawn fringe, knotted fringe or twisted grouped fringe. These details affect appearance, labour content, lint behaviour and replenishment consistency.

Where stripe layout and yarn-dyed planning matter for repeat orders, buyers can compare with wider plaid programmes in yarn-dyed cotton plaid planning.

Separate in-process construction targets from final inspected values

Buyers should ask suppliers to show two sets of numbers: loom-state targets and finished inspected values. Without that split, development approvals can look stable while bulk drifts after washing, softening or compacting.

Typical in-process control points are: grey width off loom, loom-state EPI/PPI, warp tension range, reed width, take-up rate, beam yarn lot, planned finish shrinkage and fringe withdrawal allowance. These are factory control parameters, not acceptance criteria for the customer.

Typical final inspected values are: finished body size, body GSM, net piece weight, skew/bow, fringe length, fringe bundle consistency, colour continuity under standard light, and post-laundering dimensional change. These should be written into the PO and final inspection checklist.

A practical approach is to require the supplier to submit a pre-production construction sheet and a bulk finish standard. The construction sheet should show loom targets; the bulk finish standard should show the approved finished article with measured values after the agreed finish route. That becomes the reference for inline and final QC.

For buyers new to acceptance planning, blanket quality control inspection and AQL checklist structure are useful templates even though the fabric category differs.

Loom guidance: useful, but always verify against actual mill capability

For 320gsm cotton herringbone throws, many mills produce this efficiently on rapier or air-jet dobby looms. Plain herringbone with stripe borders usually does not require jacquard unless there are logos or variable figured zones. Buyers should avoid treating 'air-jet or rapier class' as universal capability. Actual width, efficiency and defect risk depend on reed width, loom model, yarn quality, take-up history, pattern repeat, humidity control and the mill's normal style mix.

A better sourcing question is not 'what is your greige width', but 'what finished body width is routine on your current loom class without special set-up, and what width point triggers lower efficiency or extra loom allocation?' For many suppliers, 125-145cm finished body width may be routine for this construction. Pushing toward 150cm+ finished body width can be feasible, but may move the style into lower efficiency, lower loom speed or surcharge territory. Verify this with the actual supplier, not a generic assumption.

For stripe-border styles, ask for these figures before colour approval: nominal reed width, target grey width off loom, expected finished width after wash/softening, planned finishing loss, and body width tolerance after the agreed finish route. If the supplier cannot state those numbers, the development sample may not represent a stable production route.

Buyers should also ask whether the sample was made on production-equivalent loom width or on a narrower development setting. Some mills can make a good-looking proto on a non-standard set-up that does not translate cleanly to bulk. That is a common cause of repeat-order drift.

Dimensional stability and acceptance tolerances: write them into the PO

Dimensional change should be written as a test-result requirement, not confused with extra loom or cut allowance used in manufacturing. Example: the factory may build several percent extra length into production planning to hit the finished sold size, but the buyer should still specify the allowed dimensional change after washing on the final article.

For woven cotton throws, a practical reference is ISO 6330 for domestic laundering and ISO 5077 for dimensional change assessment, unless your organisation uses AATCC methods. State the wash programme clearly. A workable hotel-buyer line is: ISO 6330, 40°C domestic wash, standard detergent without optical brightener unless otherwise agreed, tumble dry low or line dry as sold-care instruction specifies, dimensional change assessed to ISO 5077 after 1 wash cycle; development confirmation after 3 cycles if required.

A workable post-wash target for this product class may be length change -3% to -5% and width change -2% to -4% after the agreed laundering method. If a soft-washed artisanal look is requested, the accepted shrinkage window may need to be looser, but it should still be written down.

Beyond laundering, buyers should add final acceptance tolerances on the finished article. A practical starting set is: finished body size ±2cm each direction for pieces up to about 180cm body length; body GSM 320gsm ±5%; net piece weight target ±4%; fringe length 6cm ±1cm; skew or bow not more than 3% across body field; piece-to-piece shade continuity within approved standard under D65 or TL84 as specified. For premium boutique programmes, some buyers tighten size to ±1.5cm and weight spread to ±3%.

For replenishment consistency, specify piece-to-piece weight spread within a carton, for example max 35g on a 130x170cm style, and lot-average weight within PO target. This matters because one-piece weight can drift even when average GSM looks acceptable on a lab report.

If care symbols are part of hotel compliance, align the sewn label with ISO 3758 care-label practice and keep the tested wash route consistent with the label claim.

Colourfastness, rubbing and light fastness: hotel buyers should not leave these open

Hotel buyers often focus on mass and handle, then discover late that colour performance was never specified. For yarn-dyed cotton throws, a practical minimum test pack should include wash fastness, rubbing fastness and, where throws are used in bright rooms or terrace-adjacent suites, light fastness.

A workable reference set is: ISO 105-C06 for wash fastness, ISO 105-X12 for rubbing fastness, and ISO 105-B02 for light fastness. Typical buyer targets for a dark or mid-tone hotel throw may be wash colour change grade 4 min, wash staining grade 3-4 min, dry rubbing grade 4 min, wet rubbing grade 3 min. For light fastness, many indoor hospitality programmes accept around grade 4 min, while sun-exposed decorative programmes may ask higher if achievable for the selected shade.

Deep navy, charcoal, black and saturated red are the usual risk shades. They can pass appearance approval and still underperform on wet crocking or visible lot-to-lot shade drift. If the throw includes contrast stripe borders, test both the darkest and lightest relevant zones because migration and visible staining risk are not always uniform across the design.

Hotels that wash throws frequently should also confirm the supplier's pilling and surface change expectation after care cycles. Woven cotton herringbone does not use the same pilling benchmarks as fleece, but buyers should still ask for a declared internal assessment after the agreed laundering route so softness is not achieved by an unstable low-twist build.

For general laundering alignment, care and washing guidance helps buyers translate lab methods into commercial care instructions.

Fringe engineering and fringe-loss acceptance

Fringe looks simple and causes a disproportionate share of claims. The main failure modes are uneven withdrawal length, bundle-count inconsistency, twist loosening, end slippage back into the body, and excess lint or yarn loss after washing. If fringe is part of the design, it should be engineered, not treated as hand-finishing trivia.

A practical PO note should state: end fringe only; finished fringe depth 6cm ±1cm; grouped 6-8 warp ends per bundle; double twist or knot method as approved standard; trimmed level after finishing. If the style uses a loose drawn fringe rather than twisted bundles, write that clearly because the visual and wash behaviour differ.

For acceptance, buyers should add a measurable fringe-loss rule. One workable commercial criterion is: no continuous missing fringe zone over 2cm, no more than 3 visibly loose or untwisted bundles per piece, and no progressive unravelling into the body field. For wash-tested development samples, ask the supplier to submit before/after photos and note any mass loss or fringe shortening trend after the agreed laundering cycle.

If the product is intended for high-turn hospitality laundry, a twisted or lightly knotted fringe usually holds better than a very soft loose fringe. The trade-off is a slightly firmer hand at the short ends and a little more labour cost. For decorative boutique-room use with lower wash frequency, loose fringe can be acceptable if the yarn quality is cleaner and the withdrawal zone is stable.

Fiber-content verification and contamination risk

Do not leave fibre claims at '100% cotton' without defining tolerance and evidence. A workable PO line is: body fabric declared 100% cotton, exclusive of labels and sewing thread; fibre-content tolerance according to applicable market rules and commercial test uncertainty; no recycled cotton unless specifically approved in writing. If recycled cotton is allowed, state the declared percentage and whether colour sorting or mélange effect is acceptable.

The main buyer risk is not only deliberate substitution. It is contamination from mixed yarn lots, recycled feedstock variability, or use of a different count or blending route on border sections. For hotel replenishment, that can show up as handle drift, shade dullness or wash-performance inconsistency.

Ask the supplier for the support route behind the fibre claim: mill yarn declaration, lot traceability, and if needed third-party fibre composition testing. A common analytical route for fibre composition is laboratory quantitative analysis under the relevant textile fibre test standard used by your market or nominated lab. For recycled claims, do not rely on generic statements alone; specify whether recycled cotton is not allowed, allowed up to a declared level, or must be segregated by SKU.

If sustainability claims are part of the brief, align them carefully with documentation expectations rather than treating them as decoration. Buyers comparing recycled programmes can review sustainable recycled blanket sourcing and scope-certificate check workflow for the documentation logic, even if this hotel throw is conventional cotton.

Sample RFQ and PO checklist buyers can copy

A good RFQ forces comparable quotes. A weak RFQ invites hidden variation. At minimum, ask suppliers to fill these fields exactly: product name; end use; sold size; body size excluding fringe; overall size including fringe; target body GSM; expected net piece weight; yarn count warp/weft; plied or singles; combed or carded; dyed method; pattern repeat; stripe map in mm; long-edge construction; fringe method; fringe depth; wash finish route; care label claim; test standards; packing format; carton quantity; quotation basis and Incoterm.

A practical PO block can read like this: Style: 320gsm yarn-dyed cotton herringbone throw. Body size: 130x170cm excluding fringe. Overall length: approx. 182cm including 6cm fringe each short end. Mass basis: body fabric 320gsm ±5%, ASTM D3776 or ISO 3801 on conditioned finished body area excluding fringe. Net textile weight: 732-747g target range. Construction: supplier to declare approved warp/weft count and finished EPI/PPI window. Dimensional change: ISO 6330 + ISO 5077, 40°C, 1 cycle, length -3% to -5%, width -2% to -4% max unless otherwise approved. Colourfastness: ISO 105-C06 grade 4 min colour change, ISO 105-X12 dry 4/wet 3 min, ISO 105-B02 grade 4 min if required. Appearance: skew/bow max 3%; fringe depth 6cm ±1cm; no major fringe unravel. Inspection: AQL 2.5 major / 4.0 minor unless otherwise agreed. Packing: 1 pc/polybag or belly band as approved; 10 or 12 pcs/carton; outer carton marks and barcode location per packing spec. Trade term: FOB Ningbo, FCA, CIF or other named Incoterm to be stated on quote.

Ask every supplier to return the RFQ in one table. If one mill replies only with marketing language and no declared construction, that is already a sourcing signal. For buyers comparing freight responsibilities, Incoterm cost-item differences remain relevant even though the product category is different.

Inspection, AQL and defect classification

For boutique hotel throws, a reasonable shipment inspection plan is often AQL 2.5 for major defects and 4.0 for minor defects, unless your internal standard is tighter. The defect list should be written for woven throws, not copied from fleece.

Typical major defects include: wrong fibre declaration, wrong size beyond tolerance, wrong stripe placement beyond approved tolerance, holes, broken ends creating visible open lines, severe skew/bow above agreed limit, major oil contamination, obvious lot shade mismatch, gross fringe omission, incorrect care label, or carton count shortage. Typical minor defects include: small slubs beyond approved natural character level, slight fringe unevenness within tolerance, minor isolated shade variation not visible at 1m under agreed light, or light pressing marks removable by handling.

For final inspection, check at least: finished size, body GSM, net piece weight, fringe depth, stripe position, skew/bow, shade continuity, pack count, carton marks and barcode readability. If the order is replenishment against an approved hotel programme, compare bulk against the last approved retained sample under the same light source.

If the throw is packed folded, inspect fold-set marks and carton compression as well. Cotton herringbone usually recovers better than plush fleece, but over-compression can still create visible edge set or border distortion on arrival.

Packing, barcode placement and replenishment consistency

Packing specifications should be written with the same discipline as fabric specs. Otherwise the supplier may hit the textile target and still create receiving problems at the hotel DC or retail back-of-house.

A practical packing block is: individual fold size, fold direction, belly band or polybag material, suffocation warning if required by market, barcode symbology, barcode location, carton quantity, carton size limit, gross weight limit and drop-test expectation if needed. For heavier woven throws, many buyers prefer outer cartons below about 15-18kg gross for manual handling, though the exact limit depends on the market and warehouse practice.

For replenishment programmes, ask for batch shade segregation on carton labels. Example: each carton should show PO number, style, colour, lot or dye batch, quantity, gross/net weight and carton sequence. Mixed shade lots inside one carton create avoidable complaints when hotels place throws room-by-room.

Buyers should also specify piece-to-piece weight spread and carton count accuracy. A practical acceptance line is carton count 100% accurate, no mixed colourways unless pre-approved, and all barcode labels placed on the same short-side panel of the retail pack for fast receiving. Small details like this matter more in replenishment than in one-off projects.

For broader lead-time and shipment planning, see custom blanket lead times and shipping controls.

Frequently asked

Does 320gsm include the fringe on a cotton throw? It should not unless the PO says so. Best practice is to define 320gsm on the finished body area only, excluding fringe, then state a separate net piece-weight range that includes fringe. That keeps supplier quotes and lab results comparable.

What is a workable size tolerance for boutique hotel cotton throws? For a woven 320gsm throw, a practical starting point is finished body size ±2cm each direction, measured flat without tension and excluding fringe. Premium programmes may tighten to ±1.5cm if the finish route is stable.

Which wash test should be written into the PO for dimensional stability? A common hospitality route is ISO 6330 for laundering and ISO 5077 for dimensional change. Write the exact protocol, such as 40°C domestic wash with the agreed drying method, because shrinkage results depend heavily on wash and dry conditions.

How should fringe quality be controlled? Specify fringe depth, bundle size, twist or knot method, and acceptance limits for loose or missing bundles. For example: 6cm ±1cm fringe, 6-8 ends per bundle, no continuous missing fringe zone over 2cm, and no unravel into the body field.

Are the suggested yarn counts and EPI/PPI mandatory for 320gsm? No. They are only working ranges for RFQ comparison. Achievable 320gsm depends on yarn quality, ply, loom width, crimp, herringbone repeat, selvedge plan and finish loss. Final approval should be based on the finished article, not generic count windows.

Should hotel buyers ask for colourfastness tests on cotton throws? Yes. At minimum, ask for wash fastness to ISO 105-C06 and rubbing fastness to ISO 105-X12. If throws may see strong daylight, add ISO 105-B02 light fastness. Dark shades need extra attention on wet rubbing and lot continuity.

How can buyers verify a 100% cotton claim? Start with yarn declarations and lot traceability from the supplier, then add third-party fibre composition testing if the risk level justifies it. If recycled cotton is not allowed, say so in writing. If it is allowed, state the declared percentage and the documentation required.

Have a project in mind? Send us your spec — we'll reply within one business day with indicative pricing and a sample plan.

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