Anatomy of a Fabric Bolt Label
Fabric bolts are cardboard tubes around which fabric is wound, usually folded in half lengthwise so the finished edges (selvages) meet. At one end of the bolt — the "bolt end" — there is a printed label, sticker, or hangtag with all the information you need. Here is what you will find, from top to bottom:
| Section | What It Tells You | Why It Matters |
|---|---|---|
| Width | Usually 44/45", 54", or 58/60" | Determines yardage calculations — wider fabric means less yardage |
| Fiber content | Percentages (e.g. "100% Cotton" or "55% Linen / 45% Rayon") | Tells you how it will behave: drape, shrinkage, iron temperature, pilling tendency |
| Care instructions | Wash, dry, iron, and bleach symbols | Legally required; tells you exactly how to launder without ruining the fabric |
| Price per yard | A dollar amount, sometimes with a SKU barcode | What the cutting counter charges; check for sale stickers on top |
| Country of origin | Where the fabric was milled or printed | Japanese cotton, Italian linen, and Indian block prints have distinct qualities |
| Color / dye lot number | A short alphanumeric code | Critical: buy all yardage from the same lot or the color may not match |
1. Fabric Width — The Number That Changes Everything
The width is usually the most prominent number on the label, often printed large near the top. It is almost always in inches for the US market, even on imported fabrics. Common widths you will see:
- 44" / 45" — Standard for quilting cotton, poplin, broadcloth, and most chain-store apparel fabrics. This is the default width most sewing patterns assume.
- 54" — Standard for home decor fabric, linen, and many imported designer cottons. About 20% wider than 45", which saves you roughly 15-20% on yardage for the same project.
- 58" / 60" — Standard for knit fabrics, drapery fabric, upholstery weight, and wide apparel fabric. At 60", you get 33% more area per linear yard than at 45".
- 108" – 118" — Extra-wide drapery and quilt backing fabric. These eliminate vertical seams in curtains and make quilt backs a single piece of fabric.
The width number on the label includes the selvages — the tightly woven edge strips that run along both sides. Selvages are usually 1/4" to 1/2" wide each and are not usable in your project (they are often printed with the manufacturer name, color dots, or registration marks). Subtract about 1" total from the labeled width to get the actual workable width.
2. Fiber Content — What the Fabric Is Actually Made Of
By law in the US (FTC Textile Rules), every fabric sold must disclose its fiber content by percentage. You will see things like "100% Cotton" or "70% Cotton / 30% Linen" or "95% Polyester / 5% Spandex." The fibers are always listed in descending order by weight.
- 100% natural fiber (cotton, linen, silk, wool, ramie) — Will shrink, breathe, and generally feel nicer against skin. Requires pre-washing.
- Natural-synthetic blends (cotton/poly, linen/rayon, wool/nylon) — Compromise fabrics: less shrinkage, less wrinkling, often cheaper than 100% natural. The feel and drape are usually dominated by the majority fiber.
- 100% synthetic (polyester, nylon, acrylic, spandex) — No shrinkage, machine washable, dries fast. Does not breathe. Lowest maintenance, lowest cost.
3. Care Symbols — Wash, Dry, Iron, Bleach
The care symbols on a bolt label follow an international standard (ISO 3758). They appear as a row of five icons, though sometimes only the relevant ones are shown. Here is how to decode each category:
| Symbol | Category | Common Variations and What They Mean |
|---|---|---|
| Wash tub | Washing | A number inside = max water temperature in Celsius (30 = cold, 40 = warm, 60 = hot). A hand in the tub = hand wash only. An X through the tub = do not wash (dry clean only). |
| Triangle | Bleaching | Empty triangle = any bleach OK. Triangle with two diagonal lines = non-chlorine bleach only (oxygen bleach). X through triangle = do not bleach. |
| Square with circle | Drying (tumble) | One dot = low heat. Two dots = medium. Three dots = high. X through symbol = do not tumble dry. A square without the circle = line dry / flat dry instructions. |
| Iron | Ironing | One dot = low (110 C, synthetics). Two dots = medium (150 C, wool/silk). Three dots = high (200 C, cotton/linen). X through iron = do not iron. |
| Circle | Dry cleaning | A plain circle = dry clean. Letters inside (P, F, A) = solvent type the dry cleaner should use. X through circle = do not dry clean. |
These symbols are not decorative — they are the manufacturer's legally binding care instructions. Ignore them and you risk shrinking, melting, or discoloring the fabric on its first wash.
4. Price Per Yard, SKU, and Dye Lot
The price label is usually a sticker with the dollar amount per yard, a barcode, and a SKU (stock keeping unit) number. Smaller independent fabric stores may hand-write the price. A few details to check:
- Sale stickers: If there is a red or yellow sticker on top of the original price, the sale price applies. But confirm at the cutting counter — some stores remove sale stickers when the promotion ends, and others leave them on indefinitely (which is confusing). When in doubt, ask.
- Dye lot number: This is usually a short code like "Lot 42B" or "DL-8931," separate from the SKU. Every production run of a printed or dyed fabric gets a unique lot number. Fabrics from different lots can look identical under store lighting but show a visible color shift in daylight. If your project needs more than one bolt's worth, check that all bolts have the same dye lot number.
- Country of origin: "Made in Japan" cotton is typically higher thread count and softer than mass-market cotton. "Made in Italy" linen and wool command a premium for good reason — Italian mills produce finer, more consistent fabric. "Made in India" or "Made in China" does not mean low quality (many excellent fabrics come from both), but the hand-feel can vary more within the same bolt.
5. How Fabric Is Folded on the Bolt
Understanding the physical arrangement on the bolt helps you visualize what you are buying:
- Standard fold: The fabric is folded in half lengthwise, with selvages meeting at one edge. When you unroll a yard, you get a piece that is 36" long by whatever the full width is — unfold it and it doubles to the labeled width. This is how most quilting cotton, apparel fabric, and home decor fabric is sold.
- Flat fold: Some heavy fabrics (upholstery velvet, thick wool coating) are wound flat onto the bolt without folding. The bolt is simply wider.
- Tubular: Some knit fabrics, especially cotton jersey, are knit as a tube and wound flat onto the bolt. The tube is seamless, so you are effectively getting a double layer with selvages on both sides. The labeled width is the flat width — the actual tube circumference is double that.
- Typical bolt quantity: A full bolt of 45" quilting cotton holds 15 yards. Apparel fabric bolts hold 8-12 yards. Home decor bolts hold 10-15 yards. Bolts are rarely full at the store — remnants and partial bolts are common. The remaining yardage is sometimes written on the label in pencil or grease marker.
Quick Bolt Label Checklist Before You Buy
Before taking a bolt to the cutting counter, check these five things:
- Width matches your project requirements. If your pattern calls for 45" fabric and the bolt says 54", your yardage estimate is likely too high — recalculate.
- Fiber content matches what you want. 100% linen vs a linen-rayon blend look similar on the bolt but behave completely differently after washing. Check the percentage, not just the name.
- Care instructions are acceptable. "Dry clean only" on a fabric meant for everyday clothing is a red flag. Make sure you are willing to follow the care routine.
- Dye lot matches across bolts. If you need multiple bolts, find ones with the same lot number. If they are different, unroll a few inches from each and compare in natural light — not under the fluorescent store lights.
- There is enough on the bolt. Ask the cutting counter to measure the remaining yardage before they start cutting. If the bolt only has 1.5 yards and you need 2, find another bolt or pick a different fabric.
Once you have your fabric home, use the yardage calculator to double-check your project requirements against the actual width you bought.