A Guide to Yarn Weights
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 …