Lace yarn (or: fingering, thread, or cobweb)
US 000 to 1
1.5 to 2.25 millimetres
Super fine yarn (or: sock, fingering, or baby)
US 1 to 3
2.25 to 3.5 millimetres
Fine yarn (or: sport or baby)
US 3 to 5
3.5 to 4.5 millimetres
Light yarn (or: DK or light worsted)
US 3 to 5
3.5 to 4.5 millimetres
Medium yarn (or: worsted, afghan, or aran)
US 7 to 9
4.5 to 5.5 millimetres
Bulky yarn (or: chunky, craft, or rug)
US 9 to 11
5.5 to 8 millimetres
Super bulky yarn (or: roving)
US 11 to 17
8 to 12.75 millimetres
