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Needlework's Pleasure

handspun/handpainted fine yarns, spinning and felting fibres







Yarn sizes and categories

There has been some confusion in the past about how yarns are being categorised for their yardage and thickness, and I also noticed a few differences in the US yarn categories compared to the European ones. 

The yarn categories below are referring to commercially spun wools, so if you have a handspun yarn and you want to categorise it by its weight/yardage relation feel free to use this list.

I have also included the wpi (= wraps per inch), which is widely used in the US. With this measurment you can calculate your approximate total  yardage for a 36" long sleeved sweater by taking your wpi and multiplying it by 100 (wpi x 100). Add 10% for every extra 2" in size from there, or deduct 10% for every 2" smaller in size. Add another 10% for cables, and 30-50% extra for fair isle knitting.


Cobweb (Wt.)

aka: single

aka: thread


Lace (Weight)

aka: 2 ply


approx. 690m/50g (767yds/1.8oz)

wpi: 40+


approx. 600-800m/100g   


wpi: 30-40

 1.5-2.5mm (US0-5)



 for lacework: 2-3.75mm (US 4-5)

Light Fingering (Weight):

aka: 3-ply

aka: sock

aka: baby

 approx. 400-480m/100g


wpi: 20-30

 2.0-3.5mm (US 0-3)

Fingering (Weight):

aka: 4-ply

aka: sock

aka: baby

approx. 400-480m/100g

(444-533 yds/3.5oz)

wpi: 14-24

 2.0-3.5mm (US 0-3)
Sport (Weight)

aka: 5-ply

approx. 300-400m/100g


wpi: 12-18

3.5-4mm (US 4-6)
Double Knit (DK)

aka: 8-ply

aka: Light Worsted

approx. 240-300m/100g


wpi: 11-15

4-4.5mm (US 6-7)
Aran (Weight)

aka: 10-12 ply

aka: Worsted

approx. 120-240m/100g


wpi: 9-12

4.5-5.5mm (US 7-9)

aka: Bulky

approx. 100-130m/100g (111-144yds/3.5oz)

wpi: 6-8

5.5-8mm (US 9-11)
Super Bulky

aka: Polar

less than 100m/100g

(less than 111yds/3.5oz)

wpi: 2-6

8.0mm+ (US 11+)














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