How to Read a Yarn Label for Substitution

A yarn label contains most of the information needed to screen a substitute. The location and symbols vary, but look for length, ball weight, fibre, yarn-weight category, suggested gauge, tool size and care instructions.

Length and physical weight

The label may show metres and yards alongside grams and ounces. These are two different measurements: length tells you how much yarn is in the ball; grams or ounces tell you how heavy the ball is.

For quantity, use length. For comparison, divide length by weight to calculate metres per gram or yards per ounce.

Yarn weight number or name

Many labels display a number from 0 to 7 or a name such as fingering, DK, worsted or bulky. This describes a thickness family. It is useful for filtering candidates but is not precise enough to guarantee substitution.

Fibre composition

Look for percentages such as 100% wool or 60% cotton / 40% acrylic. Fibre affects warmth, stretch, resilience, drape, moisture, stitch definition and washing. A fibre change may be intentional, but the finished project will not necessarily behave like the original.

Gauge or tension

The label gauge often shows a square with a stitch count and row count over 10 cm or 4 in, plus a suggested needle or hook size. Compare the stitch count with the pattern target. A yarn capable of a similar gauge is a more plausible candidate.

The suggested tool size is not a rule. Use the tool that produces the required gauge and a fabric you like.

Care symbols

Check washing temperature, machine or hand washing, drying and ironing. Combining yarns with incompatible care requirements can create problems in colourwork or multi-yarn projects.

Dye lot and colour number

The colour name or number identifies the shade. The dye-lot number identifies a production batch. Buy enough of one dye lot where possible, because later batches may differ slightly.

What if the label is missing?

If you know the product, consult the manufacturer’s current or archived information. Otherwise, measure wraps per inch as a rough thickness clue and weigh a known length if practical. Both methods are approximate, so use a swatch before relying on the yarn for a fitted project.

The Craft Yarn Council label guidance explains common industry symbols.