Knitting Needle and Crochet Hook Gauge
A free tool for identifying a knitting needle or crochet hook whose size label has worn off. Lay the needle on a calibrated on-screen ruler, or print a 1:1 paper gauge, and read its diameter in millimetres with the US and UK equivalents.
How to identify a needle or hook
1
Pick a mode
Choose "Measure on screen" for a calibrated ruler, or "Print a gauge" to download a paper sheet.
2
Calibrate or print at 100%
On screen, match the blue rectangle to a bank card. On paper, print at Actual size and check the 50 mm bar.
3
Measure and read
Lay the needle shaft across the scale; the tool shows the millimetre size with US and UK equivalents.
Read needle and hook sizes in mm, US and UK
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