Set your region

We'll choose the usual language and units for you.

Recommended settings

English · Metric · grams

Change language or units

Explore guide

Compare crochet hook sizes

Compare the diameter in millimeters; numbered steel hooks and lettered hooks belong to different sizing systems.

Related lessons and tools
  1. Yarn label anatomy: turn symbols and numbers into decisions
  2. Crochet hook anatomy: head, throat, shaft, and grip
  3. Yarn twist and ply: structure before stitch

Compare the diameter in millimeters; numbered steel hooks and lettered hooks belong to different sizing systems.

Before you start

Keep the exact labels and make two comparable samples. Change one material property at a time and use the intended finishing method on both.

Try this example

Two hooks marked 2 can have different diameters. Read their manufacturer tables, then crochet ten stitches with each and compare the relaxed width.

Check your result

  • Compare the dry samples for recovery, surface, drape and the property needed for the project. Record observations separately from label claims.
  • A fiber name or category cannot predict every finished fabric. Construction, treatment, gauge and use all affect the result.

Sources

Browse editable craft templates

Report a correction.

Illustration: Close views of a crochet hook throat, shaft and working loop with a loose and a tight loop on separate samples.

Send a message

Contact ThreadCabin

Tell us what you need help with. Do not include passwords or access links.