Most bracelets are closed and rigid.
The size described in the product descriptions gives the diameter of the bracelet, in mm.
To determine your approximate size for a rigid bracelet, you need to measure the size of your palm to ensure it fits within the bracelet's diameter at its widest point, as shown in the image below. Add 0.3 mm or 0.4 mm.
Refer to the conversion chart below to determine the minimum size for your bracelet. You can select one or two sizes larger depending on your preference.
| Size of your palm (cm) | Minimum bracelet diameter |
| 6.0 to 6.5 cm | 50 to 52 mm |
| 6.5 to 6.9 cm | 52 to 54 mm |
| 6.9 to 7.3 cm | 54 to 56 mm |
| 7.3 to 7.7 cm | 56 to 58 mm |
| 7.7 to 8.1 cm | 58 to 60 mm |
| 8.1 to 8.3 cm | 60 to 62 mm |
| 8.4 to 8.6 cm | 62 to 64 mm |
| 8.6 to 8.8 cm | 64 to 66 mm |
| 8.8 to 9.0 cm | 68 to 70 mm |