Find Your Ring Size
The most common worry in a surprise proposal is the one that matters least: ring size is adjustable. Still, arriving close makes the moment perfect. Four reliable ways to find her size, ranked by accuracy.
Method 1, Borrow a ring she already wears (best)
Take a ring she wears on her ring finger (left hand if that’s where it will live), and either bring it to us, or measure its inner diameter in millimetres with a ruler across the widest point. That single number is all we need, find it in the table below.
Method 2, The string method
- Wrap a thin strip of paper or string snugly around the base of her finger.
- Mark where it overlaps, then measure the length in millimetres; that’s the circumference.
- Match it in the table below. Measure in the evening (fingers swell slightly) and avoid measuring when cold.
Method 3, Ask us for a free ring sizer
We’ll send a proper ring sizer with your insured delivery, or hand you one at the atelier, free, no purchase needed. Message us on WhatsApp and we’ll arrange it.
Method 4, Recruit an accomplice
Her sister, her mother, her best friend. They usually know, and they keep secrets better than you’d think. They can also borrow the right ring for Method 1.
Ring size conversion table
| Inner diameter (mm) | Circumference (mm) | US size | EU size |
|---|---|---|---|
| 14.9 | 46.8 | 4 | 47 |
| 15.3 | 48.0 | 4.5 | 48 |
| 15.7 | 49.3 | 5 | 49 |
| 16.1 | 50.6 | 5.5 | 50.5 |
| 16.5 | 51.9 | 6 | 52 |
| 16.9 | 53.1 | 6.5 | 53 |
| 17.3 | 54.4 | 7 | 54.5 |
| 17.7 | 55.7 | 7.5 | 55.5 |
| 18.1 | 57.0 | 8 | 57 |
| 18.5 | 58.3 | 8.5 | 58 |
| 19.0 | 59.5 | 9 | 59.5 |
| 19.4 | 60.8 | 9.5 | 61 |
| 19.8 | 62.1 | 10 | 62 |
Between two sizes? Choose the larger, sizing down is easier than sizing up.
If you’re still unsure
Buy at our best estimate and propose. Resizing takes a few days at the atelier, the proposal never has to wait for a half-size. For rings with pavé or eternity bands, ask us first: some designs size differently, and we’ll advise before you commit.