Crochet Hook Size Converter
Convert between US letter/number, metric (mm), and UK/Canadian crochet hook sizes with a full reference table.
| US Size | Metric (mm) | UK / Canadian | Recommended Yarn Weight |
|---|
Crochet Hook Materials
Aluminum hooks are the standard choice — lightweight, durable, and affordable. They work well with most yarns and have a smooth finish that allows yarn to glide easily. Inline vs tapered head shapes are a personal preference: inline hooks (like Susan Bates) have a more defined hook throat, while tapered hooks (like Boye) have a gradual taper. Many beginners find one style significantly easier than the other.
Bamboo and wood hooks have a warmer feel and slight grip — helpful for slippery yarns. They are quieter to use than metal and feel more comfortable during long sessions. Steel crochet hooks (sizes 00–14) are used for fine thread crochet and lace work and are sized differently from regular hooks — larger numbers mean smaller hooks.
Ergonomic Hooks for Wrist Health
Repetitive motion injuries like carpal tunnel syndrome and tendinitis are common among crocheters who work for long periods. Ergonomic hooks have a wider, shaped handle that distributes grip pressure across the whole hand instead of concentrating it on two or three fingers. Brands like Clover Soft Touch, Tulip Etimo, and Furls offer excellent ergonomic options. Taking breaks every 30–45 minutes and stretching your hands, wrists, and forearms is equally important regardless of hook type.