Ring Size Guide
Our rings are made in French sizes, which correspond to the inside circumference of the ring in millimetres. Find yours in a few minutes with one of the methods below, or let us send you a ring sizer.
Receive a complimentary ring sizer
We will send you a ring sizer free of charge, wherever you are, so you can find your size at home before choosing your piece. You can also book a private appointment, in Paris or by video, and we will size your finger with you.
Find your size at home
With a ring you own
- Choose a ring that fits well on the finger you want to wear your new piece on.
- Measure its inside diameter, from one inner edge to the other, in millimetres.
- Find the closest diameter in the chart below to read your size.
With a strip of paper
- Wrap a thin strip of paper around the base of your finger, snug but not tight.
- Mark where the paper overlaps, then lay it flat against a ruler.
- The length in millimetres is your French size: 54 mm is a size 54.
Size chart
| French size | Inside diameter | US | UK |
|---|---|---|---|
| 47 | 15.0 mm | 4 | H½ |
| 48 | 15.3 mm | 4½ | I½ |
| 49 | 15.6 mm | 5 | J½ |
| 50 | 15.9 mm | 5¼ | K |
| 51 | 16.2 mm | 5¾ | L |
| 52 | 16.6 mm | 6 | L½ |
| 53 | 16.9 mm | 6½ | M½ |
| 54 | 17.2 mm | 7 | N½ |
| 55 | 17.5 mm | 7¼ | O |
| 56 | 17.8 mm | 7¾ | P |
| 57 | 18.1 mm | 8 | P½ |
| 58 | 18.5 mm | 8½ | Q½ |
| 59 | 18.8 mm | 8¾ | R½ |
| 60 | 19.1 mm | 9 | S |
The French size is the inside circumference in millimetres. US and UK equivalents are rounded to the nearest standard size.
For a perfect fit
Measure at the end of the day, when your fingers are at their largest, and never when your hands are cold. Your dominant hand is often slightly larger than the other.
Make sure the ring can slide over your knuckle. If you fall between two sizes, choose the larger one.
Statement rings such as Crush Nova cover more of the finger and feel snugger than a fine band: we recommend going up half a size to one size.
Questions
I'm offering a ring as a gift. How do I find the right size?
Borrow a ring she wears on the same finger and measure its inside diameter. If that isn't possible, write to us: we will help you choose, discreetly.
Can my ring be resized?
Write to us before ordering and we will confirm whether your chosen piece can be adjusted by our workshop.
What is the most common ring size?
For women, sizes 52 to 54 (US 6 to 7) are the most common.
Still unsure? Our concierges are here to help at contact@raphaellecoqblin.com.
