How to Read a Yarn Label

What is on a ball band

Gauge is the one people skip

The gauge on a ball band is the manufacturer telling you what fabric this yarn makes at a normal tension. It is usually given as stitches and rows over a 4in square on a stated needle size.

• It is not a promise about your knitting. Your hands are not the test knitter's hands.
• It is a compatibility check. If a pattern wants 18 stitches to 4in and the band says 13, this yarn is the wrong weight for that pattern.
• It is a starting point for your swatch, and nothing more.
• Crochet gauge is given separately on most bands, because the same yarn produces a different stitch count on a hook.

Yardage, not ball count

Patterns that specify a number of balls are quietly specifying a number of balls of one particular yarn. Substitute a different yarn and the ball count is meaningless - only the total yardage transfers.

1. Find the total yardage the pattern needs. Balls times yardage per ball of the pattern's yarn.
2. Divide by your yarn's yardage per ball.
3. Round up to a whole ball, always.
4. Add ten percent for a plain piece, more for a border or colorwork.

The difference this makes is large. A worsted acrylic at 364 yards a skein and a super bulky chenille at 108 yards a ball are both sold as 'a ball of yarn' and one contains more than three times the other. How much yarn do I need has the area method for when the pattern does not tell you.

The weight symbol, and its limits

The number in the skein symbol is the Craft Yarn Council category, from 0 (lace) to 7 (jumbo). It is a genuinely useful shorthand and it is a band, not a point.

Two yarns can both be category 4 medium and behave very differently - one at 364 yards per 198g and another at 220 yards per 100g are not interchangeable despite carrying the same symbol. Use the symbol to narrow the field and the gauge to make the decision. The full chart is on the yarn weight chart.

Dye lot: photograph it now

The dye lot number identifies the batch this ball was dyed in. Two balls of the same color from different lots can differ enough to show as a visible line across a finished piece.

• Buy the whole project in one lot. This is the only reliable protection.
• Photograph the band before you start. The lot number is the field you will need and the band is the thing you will throw away.
• 'No dye lot' on the band means the manufacturer controls color across batches - genuinely useful for blankets and for anything you make repeatedly.
• If you are short and cannot match, alternate two balls every few rows so the change is gradual rather than a line.

How yarn is dyed and dye lots covers why the variation happens at all.

Care symbols

The pictograms are a standardized international set: a tub for washing, a triangle for bleaching, a square for drying, an iron for ironing, a circle for dry cleaning. A cross through any of them means do not.

The one to read carefully is the wash tub, because the number in it is a maximum temperature and a bar underneath it means a gentler action. Full decoding is on yarn care symbols, and the practical version is in caring for hand knits.

Fiber content

• Percentages are by weight, so '80% acrylic, 20% wool' is a mostly-acrylic yarn.
• 'Superwash' is a treatment, not a fiber, and it changes how the wool behaves - see superwash vs non-superwash.
• 'Wool' without qualification can be any sheep breed, which is why two wool yarns can feel entirely different.
• A small nylon percentage in sock yarn is there for abrasion resistance - see what nylon does in yarn.

What to do with the band

1. Photograph it before you wind the ball. Front and back.
2. Keep one band per project with the project, not in a drawer.
3. Tape one to the finished item's care note if you are giving it away or selling it.
4. Write the needle you actually used on it, because next time you will not remember.

If the band is already gone, a needle gauge will tell you the needle and a kitchen scale plus a wraps-per-inch count will get you close on the yarn. Yarn substitution is the recovery method.