3 mm crochet hook
A 3 mm hook is not given a US letter size, UK 11, and 5/0号 in Japan. Buy by the millimetre number — it's printed on every hook and it means the same thing everywhere.
Sport weight, Japanese DK patterns.
The same hook in every system
| Millimetres (the one that always works) | 3 mm |
|---|---|
| US | no US size |
| UK | 11 |
| Japanese 号 | 5/0号 unverified |
| Type | standard |
Systems with no exact match
3 mm has no direct equivalent in 1 of the three systems. These are the closest hooks, with the size difference spelled out — substitute at your own gauge risk.
| System | Closest hook | Actual size | Difference |
|---|---|---|---|
| US | C/2 | 2.75 mm | -0.25 mm |
Yarn weights that suit this hook
1 standard yarn weight list 3 mm inside their recommended hook range. Expected single crochet gauge over 4 inches is shown as a range — the CYC figures assume a mid-range hook, so at 3 mm you will land toward the loose end. Swatch before you commit.
| US weight | UK | Japan | sc / 4 in |
|---|---|---|---|
| Super Fine | 4 ply | 合細 | 21-32 |
Aluminium, ergonomic and Japanese-style options in this size.
View on Amazon USShopping elsewhere? Amazon UAE
As an Amazon Associate we earn from qualifying purchases. Links to Amazon on this page are affiliate links; buying through them costs you nothing extra.
Nearby sizes
All hook sizes · US to Japanese hook chart
Last updated 2026-08-30.