How to read a yarn count
For filament yarn, the first number is the denier (grams per 9,000 metres, so thickness) and the second is the number of filaments: 75/36 is 75 denier with 36 filaments. For spun yarn, the number is the English count (Ne), where higher is finer: 30/1 is a single 30s, and 2/24 is two plies of 24s.
Win Star Industries, Surat. Updated 21 October 2026.
Try a count
Denier and filaments
Denier is the weight in grams of 9,000 metres of yarn: 75 denier means 9,000 m weigh 75 g. The filament count is how many continuous filaments make up the yarn. Divide denier by filaments to get denier per filament (dpf): under 1 is microfilament, very soft; over 5 is coarse and crisp.
A third number: plies
150/288/2 means two plies of 150 denier, 288 filament yarn twisted together, so the finished yarn is about 300 denier.
Spun counts are the other way round
Spun yarns use the English count (Ne): the number of 840-yard hanks in a pound. Higher means finer. 30/1 is single 30s; 2/24 is two plies of 24s twisted together.
Letters after the count
SD or BRT is the lustre (semi-dull or bright), HIM, SIM or NIM the intermingle level, and CD means cationic dyeable. See the glossary for each term.
From us
Polyester filament yarn: dty, fdy, poy and bsy in many counts. See also the glossary and our other articles.