How to Find Her Ring Size Without Spoiling the Surprise
A ring is a lovely gift right up until it doesn't fit. Here's how to get the size right while keeping it a secret, plus one thing that's different about smart rings.
Interactive · Secret mission
Find her size without her knowing
Mission 1: borrow a ring
Pick one she wears on the finger you're buying for (ask her best friend which). Plain, flat bands work best.
Mission 2: measure the inside
Lay it on a ruler and measure straight across the inside edge, in millimetres. Or trace the inside circle on paper and measure that.
Mission 3: return it fast
Put it back exactly where it was. Then type the measurement below.
Backup plan
No ring to borrow? Pick her usual size if you know it, and size up one. If it's wrong, she gets a free size exchange: the new size ships first.
Uses the standard US ring scale; a guide, not a guarantee. Odessa comes in US sizes 6–14 in every colour.
1. Borrow a ring she already wears
Pick one she wears on the finger she'd likely use (index or middle for a smart ring). Measure the inside diameter, or use our printable ring sizer to match it.
2. Trace it
No time to measure? Trace the inside of her ring on paper with a sharp pencil and measure the circle later.
3. Ask her friends or family
A sister, best friend or her mom may already know, or can find out casually.
Screen-free · No subscriptionOdessa Smart RingShop the ring →
4. The "trying on rings" trick
Window-shopping together? Let her try a few on and note the size that fits.
5. Compare with your own fingers
Slip her ring onto your finger and mark where it stops. It's rough, but better than guessing.
Smart rings fit differently
Smart rings are wider than regular bands, so they sit a little more snugly. If you're between sizes, go one size up. Odessa comes in US sizes 6–14:
| US size | Inside circumference |
|---|---|
| 6 | 52 mm |
| 7 | 55 mm |
| 8 | 57 mm |
| 9 | 60 mm |
| 10 | 62 mm |
| 11 | 65 mm |
| 12 | 67 mm |
| 13 | 70 mm |
And if you get it wrong?
With Odessa, size swaps are free: we ship the new size before she returns the old one.
See the Odessa Smart Ring, $79.99 → · Gift ideas for her
