Find your ring size on your screen.
You need a bank card and a ring that fits the finger you’re buying for. Two steps, about a minute.
1Match your screen
Hold a bank card upright against the screen, short side across, and slide until the outline is exactly as wide.
Card
Any card the size of a credit card works: library cards, ID, gift cards. Your screen is remembered on this device.
2Match your ring
Lay the ring on the circle and resize the circle until it just fills the inside of the ring.
17.3 mm
Size chart
Measure the inside of a ring that fits, edge to edge, with a ruler in millimeters.
| US size | Inside diameter | Inside circumference |
|---|---|---|
| 4 | 14.9 mm | 46.8 mm |
| 4½ | 15.3 mm | 48.1 mm |
| 5 | 15.7 mm | 49.3 mm |
| 5½ | 16.1 mm | 50.6 mm |
| 6 | 16.5 mm | 51.8 mm |
| 6½ | 16.9 mm | 53.1 mm |
| 7 | 17.3 mm | 54.3 mm |
| 7½ | 17.7 mm | 55.6 mm |
| 8 | 18.1 mm | 56.9 mm |
| 8½ | 18.5 mm | 58.1 mm |
| 9 | 18.9 mm | 59.4 mm |
| 9½ | 19.4 mm | 60.9 mm |
| 10 | 19.8 mm | 62.2 mm |
- Measure at the end of the day. Fingers are a little bigger in the evening and when it’s warm.
- Wide bands fit tighter. For bands 5 mm or wider, like the Three-Line Band, go up half a size.
- Between sizes? Pick the larger one. Resizing is free for a year either way.