Rings · necklaces · straps
Size guide
Ring sizes, necklace lengths and watch strap widths, with simple ways to measure at home.
01Rings: US sizes 5 to 10
Our rings are made in US sizes. The chart shows the standard inside diameter and inside circumference for each size.
| US size | Inside diameter | Inside circumference | Approx. UK / EU |
|---|---|---|---|
| 5 | 15.7 mm | 49.3 mm | J½ / 49 |
| 6 | 16.5 mm | 51.9 mm | L½ / 52 |
| 7 | 17.3 mm | 54.4 mm | N½ / 54 |
| 8 | 18.1 mm | 57.0 mm | P½ / 57 |
| 9 | 19.0 mm | 59.5 mm | R½ / 59 |
| 10 | 19.8 mm | 62.1 mm | T½ / 62 |
Measure at home
- Wrap a thin strip of paper around the base of the finger, snug but not tight.
- Mark where the paper overlaps and measure that length in millimetres. That is the circumference.
- Choose the size with the nearest circumference. Between two sizes, choose the larger one.
Or measure the inside diameter of a ring that already fits the same finger. Fingers are a little larger when warm, so measure at the end of the day.
02Necklaces: 40 to 50 cm
Every necklace we sell adjusts between 40 and 50 cm with an extender chain.
- 40 cmSits at the base of the neck, just above the collarbone on most people.
- 45 cmFalls on the collarbone — the most common length for a pendant.
- 50 cmFalls just below the collarbone; good over a crew neck or for layering.
03Watch straps: 18, 20 or 22 mm
Strap width is the inside gap between the two lugs of your watch — the parts that hold the spring bar.
- Remove the strap, or turn the watch over.
- Measure the gap between the lugs with a ruler or caliper, in millimetres.
- Choose the matching width: 18, 20 or 22 mm. The width is often printed on the back of the old strap.
Straps are sold without a watch. Check that the spring bars are seated in both lugs before wearing.