Size Conversion

Quickly convert between Metric, US, and vintage UK sizes for both knitting needles and crochet hooks.

Metric (Source)US KnittingUS CrochetVintage UK
2.0mm014
2.25mm1B-113
2.75mm2C-212
3.0mm11
3.25mm3D-310
3.5mm4E-4
3.75mm5F-59
4.0mm6G-68
4.5mm777
5.0mm8H-86
5.5mm9I-95
6.0mm10J-104
6.5mm10.5K-10.53
7.0mm2
8.0mm11L-110
9.0mm13M/N-1300
10.0mm15N/P-15000
12.0mm17
15.0mm19P/Q
25.0mm50S

PurlStreet Note: Always check your gauge! Even with the "correct" size, every hand knits a little differently.