Men’s ring size chart
This chart covers US sizes 6 to 14, from 16.5 mm to 23.0 mm across inside, with the circumference and the nearest UK and ISO size. Ring sizes are one scale for everyone: this page shows the part of it jewellers list for men’s rings.
Men’s ring sizes
| US / Canada | Inside Ø mm | Circumference mm | UK | ISO |
|---|---|---|---|---|
| 6 | 16.5 | 51.9 | L½ | 52 |
| 6.5 | 16.9 | 53.1 | M½ | 53 |
| 7 | 17.3 | 54.4 | N½ | ≈ 54 |
| 7.5 | 17.7 | 55.7 | O½ | ≈ 56 |
| 8 | 18.1 | 57.0 | P½ | 57 |
| 8.5 | 18.5 | 58.2 | Q½ | ≈ 58 |
| 9 | 18.9 | 59.5 | R½ | ≈ 60 |
| 9.5 | 19.4 | 60.8 | ≈ S½ | ≈ 61 |
| 10 | 19.8 | 62.1 | ≈ T½ | 62 |
| 10.5 | 20.2 | 63.3 | ≈ U½ | ≈ 63 |
| 11 | 20.6 | 64.6 | ≈ V½ | ≈ 65 |
| 11.5 | 21.0 | 65.9 | ≈ W½ | 66 |
| 12 | 21.4 | 67.2 | ≈ X½ | ≈ 67 |
| 12.5 | 21.8 | 68.5 | ≈ Z | ≈ 68 |
| 13 | 22.2 | 69.7 | ≈ Z+1 | ≈ 70 |
| 13.5 | 22.6 | 71.0 | ≈ Z+2 | 71 |
| 14 | 23.0 | 72.3 | ≈ Z+3 | ≈ 72 |
No standard says which sizes are for men. Blue Nile’s size guide, read November 10, 2026, lists men’s rings in sizes 3 through 13, so this chart starts at US 6 and runs up to 14.
Choosing a men’s ring size
The most reliable start is a ring you already wear on the same finger of the same hand: lay it on the on-screen sizer and match its inside edge. Men’s rings are often wider than women’s, and a wide band covers more of the finger, so a size that suits a thin band can feel snug.
If your measurement falls between two sizes, the larger one is the safer choice when the ring has to pass a large knuckle, because a ring that will not go on cannot be worn at all.
Questions
Are men’s ring sizes different from women’s?
No. A US 10 is the same inside diameter on any ring, because there is one scale. What differs is which sizes jewellers stock for men, which is why this chart starts at US 6.
Why does a wide band feel tight?
A wide band covers more of the finger than a thin one, so a size that suits a thin band can feel snug. Ask the jeweller whether to go up a size for the band you want.