Hook gauge

Hook gauges are usually made of plastic or aluminum and have sizing holes from 2mm to 11mm diameter.

[1] A hook gauge is the most reliable way to determine the actual size of a tool.

Even though most hooks and needles have metric sizing, tool dimensions vary slightly between different manufacturers.

This is an all-important guide to obtaining the proper size of the square or garment you are working on.

Accurate needle and hook sizing reduces the number of variables that affect these decisions.