Convert US Ring Sizes to French Ring Sizes
1 us / canada size = -0.9095 french ring sizes. Multiply by 2.5535, then − 3.463.
1 US = -0.9095 FR
Multiply by 2.5535, then − 3.463.
Fingers change size with temperature and time of day, and wide bands fit tighter. Have a jeweller confirm before buying. About accuracy
US Ring Sizes to French Ring Sizes table
| US Ring Sizes | French Ring Sizes |
|---|---|
| 1 US | -0.9095 FR |
| 2 US | 1.644 FR |
| 3 US | 4.1975 FR |
| 4 US | 6.751 FR |
| 5 US | 9.3045 FR |
| 10 US | 22.072 FR |
| 20 US | 47.607 FR |
| 25 US | 60.3745 FR |
| 50 US | 124.212 FR |
| 100 US | 251.887 FR |
| 500 US | 1,273.287 FR |
| 1000 US | 2,550.037 FR |
About these units
The us / canada size (US) is a US customary unit of ring size.
The france / spain size (FR) is a specialist or regional unit of ring size.
Going the other way, 1 france / spain size = 1.7477971 us ring sizes. Ring sizes are all derived from the inner circumference of the band. The US scale adds about 2.55 mm of circumference per size, the ISO standard quotes the circumference in millimetres directly, and France and Spain quote the circumference minus 40. Measure a ring that already fits rather than your finger, at room temperature.
Frequently asked
- How many french ring sizes are in a us / canada size?
- 1 us / canada size = -0.9095 french ring sizes.
- How do you convert us ring sizes to french ring sizes?
- Multiply by 2.5535, then − 3.463.
- What is 10 US in FR?
- 10 US = 22.072 FR.