Convert between US, UK, and metric needle sizes, plus crochet hook conversions.
Knitting: Most common sizes: US 6 (4mm), US 8 (5mm), US 10 (6mm)
Crochet: Most common sizes: G/6 (4mm), H/8 (5mm), I/9 (5.5mm)
Tip: Always check your gauge when switching needle sizes!