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Ring size guide
We make every ring in US sizes 3 to 11, including half sizes. Here they are with the matching UK and EU sizes.
Find your size at home
- Take a ring that fits the intended finger well.
- Measure the inside diameter across the widest point, in millimetres, or place the ring on the printable sizer below.
- Match it to the nearest size in the table. If you are between sizes, choose the larger.
Fingers are slightly larger at the end of the day and in warm weather, so measure more than once. Not sure? Choose “Not sure yet” when designing and we’ll confirm your size with you before your ring is made.
UK sizes are letters and EU sizes are the inside circumference in millimetres. Charts from different jewellers can differ by half a size, so if you know your size in one system from a ring that fits, the measurement in millimetres is the surest guide.
Design your ring| US size | UK size | EU size | Inside diameter | Inside circumference |
|---|---|---|---|---|
| 3 | F½ | 44 | 14.1 mm | 44.2 mm |
| 3.5 | G½ | 45 | 14.5 mm | 45.5 mm |
| 4 | H½ | 47 | 14.9 mm | 46.7 mm |
| 4.5 | I½ | 48 | 15.3 mm | 48.0 mm |
| 5 | J½ | 49 | 15.7 mm | 49.3 mm |
| 5.5 | K½ | 51 | 16.1 mm | 50.6 mm |
| 6 | L½ | 52 | 16.5 mm | 51.9 mm |
| 6.5 | M½ | 53 | 16.9 mm | 53.1 mm |
| 7 | N½ | 54 | 17.3 mm | 54.4 mm |
| 7.5 | O½ | 56 | 17.7 mm | 55.7 mm |
| 8 | P½ | 57 | 18.1 mm | 57.0 mm |
| 8.5 | Q½ | 58 | 18.5 mm | 58.2 mm |
| 9 | R½ | 60 | 18.9 mm | 59.5 mm |
| 9.5 | S½ | 61 | 19.4 mm | 60.8 mm |
| 10 | T½ | 62 | 19.8 mm | 62.1 mm |
| 10.5 | U½ | 63 | 20.2 mm | 63.3 mm |
| 11 | V½ | 65 | 20.6 mm | 64.6 mm |
Printable ring sizer
Print this page at 100% (“Actual size”), not “Fit to page”. Then check the scale: the line below must measure exactly 50 mm with a ruler. Lay a ring that fits on the circles: the right size is the circle whose line just shows inside the ring. On screen the circles are not to scale.