💍 Jewellery
62.1 mm Ring Size
A ring with an inner circumference of 62.1 mm measures US 10 (EU/ISO 62, UK T½, 19.8 mm diameter). Full cross-system table below.
Circumference 62.1 mm = US 10
Inner circumference ≈ 62.1 mm · diameter ≈ 19.8 mm · EU/ISO 62
Full cross-system equivalents for this ring size:
| US | UK | EU | JP | Circ (mm) | Diam (mm) |
|---|---|---|---|---|---|
| 8.5 | Q½ | 58 | 17 | 58.3 | 18.5 |
| 9 | R½ | 60 | 18 | 59.5 | 18.9 |
| 9.5 | S½ | 61 | 19 | 60.8 | 19.4 |
| 10 | T½ | 62 | 20 | 62.1 | 19.8 |
| 10.5 | U½ | 63 | 22 | 63.4 | 20.2 |
| 11 | V½ | 65 | 23 | 64.6 | 20.6 |
| 11.5 | W½ | 66 | 24 | 65.9 | 21.0 |
⚠️ UK letters vary by jeweller: half-letter conventions differ slightly between brands. The EU/ISO number equals the inner circumference in mm, so it's the most reliable cross-check. If between sizes, order the larger.
Need a different size? Use the live ring size converter to convert any value, including a mm measurement.
ⓘ Affiliate links below. As an Amazon Associate we earn from qualifying purchases at no extra cost to you.
★ Top pick · Recommended on Amazon
Ring Sizer Tool (Set)
Reusable finger-gauge set to measure your true size at home before ordering.
View on Amazon →Recommended on Amazon
Digital Caliper
Measure an existing ring's inner diameter in mm to the tenth for an exact match.
View on Amazon →Recommended on Amazon
Men's Tungsten Band
Larger sizes are often men's — durable tungsten bands in a full size range.
View on Amazon →