Yarn Weight Reference Chart

All 8 CYCA yarn weights with gauge, WPI, needle, hook sizes, common uses, and fiber care guide.

CYCA Yarn Weight Chart

Weight Name CYCA # Common Names WPI Knit Gauge (4") Crochet Gauge (4") Needle (mm) Hook (mm) Common Uses

Fiber Content Reference

FiberCharacteristicsProsConsCare

How to Use This Reference

  • Use the filter box above each table to search by any column value — weight name, fiber, CYCA number, etc.
  • CYCA Numbers are the Craft Yarn Council of America's standardized weight system (0–7). CYCA 0 is the finest; CYCA 7 is the heaviest.
  • WPI (Wraps Per Inch) lets you classify unlabeled yarn — wrap it around a ruler and count the wraps in one inch.
  • Gauge ranges assume stockinette stitch for knitting and single crochet for crochet, over 4 inches with recommended needle/hook size.