How to Find Her Ring Size Secretly
Planning a surprise? You don't need her exact size to propose — here are the most reliable discreet ways to find it, plus a safety net if you're not sure.
Quick answer
The most reliable trick is to borrow a ring she already wears on the right finger and have it measured. If that's not possible, use the string-or-paper method, ask someone she trusts, or start from a UK average. And because we offer resizing and make each ring to your size, you can propose with confidence even if the fit isn't perfect on the day.
1. Borrow a ring she already wears
The single most reliable method: quietly borrow a ring she already wears on her ring finger (or note which finger it fits). Take it to a jeweller to be measured, or trace the inside circle carefully. Even slipping it onto your own finger and marking where it sits gives a jeweller a strong starting point. Make sure it's a ring for the correct finger — sizes differ between fingers.
2. The string or paper method
If you can borrow a ring but can't get it measured, wrap a strip of paper or string around the inside of the ring, mark where it meets, and measure the length in millimetres — that's the inside circumference, which maps to a ring size. You can also do this around her finger if you get the chance while she's asleep or relaxed, though a borrowed ring is more accurate.
3. Ask someone she trusts
A close friend, sibling or parent is often the easiest route — they may know her size, or can find out casually. Friends can also go "ring shopping" together for fun and report back a size. It keeps the surprise intact while getting you a reliable answer.
4. Start from a UK average
If all else fails, a common starting point in the UK is around size M–O for women and T–V for men — but this is only a rough guide, as hand size varies a lot. Use an average only as a last resort, and lean on the resizing safety net below.
5. Don't worry about perfection — we resize
Here's the reassuring part: you don't have to get it exactly right to propose. Once the ring is ordered we can send a free ring sizer for a precise fit, and we offer resizing so the ring can be adjusted after the big moment. Every ring is made to your size in solid 9, 14 or 18ct gold, so propose with the ring you chose and we'll perfect the fit together afterwards.
Which method suits you?
Because every band is made to order in your size and carat, you can keep the design you love and adjust the details to suit. Message our team on WhatsApp and we'll help you choose.
Frequently asked questions
How can I find out her ring size without her knowing?
Borrow a ring she already wears on her ring finger and have it measured, use the string-or-paper method to measure its inside circumference, or ask a close friend or family member. A UK average is a last resort.
What is the average ring size for women in the UK?
As a rough guide it's often around UK size M to O for women and T to V for men, but hand size varies a lot, so treat this only as a starting point.
What if I get the ring size wrong?
It's not a problem. We make each ring to your size and offer resizing, and we can send a free ring sizer after you order, so the fit can be perfected after the proposal.
Can I measure her finger with string?
Yes. Wrap string or paper around her finger or the inside of a ring she wears, mark where it meets, and measure the length in millimetres — that maps to a ring size. A borrowed ring is the most accurate.
Do I need her size before I order?
No. You can propose first and confirm the size afterwards — we send a free ring sizer once you order and offer resizing for the final fit.