If the proposal is a surprise, you cannot ask. Here are five reliable ways to find her ring size without giving the game away, ordered from most to least stealthy — plus what to do if you get it slightly wrong.
Key takeaways
- The most reliable method is to borrow a ring she already wears on that finger.
- The string or floss method works if you cannot borrow one.
- Most women's ring sizes fall between US 5.5 and 7.
- If you are unsure, size up slightly — a loose ring is the easier fix.
- Every Montare ring includes a free resizing in the first 60 days.
1. Borrow a ring she already wears (most reliable)
Take a ring she wears on the same finger — typically the fourth finger of the left hand. Bring it to a jeweller, or trace its inner circumference on paper and measure the diameter in millimetres. Most rings sit at US 5.5 to 7. Even a ring from a different finger gives a calibration starting point.
2. The string method
While she is asleep, gently wrap string or floss around the base of her ring finger and mark where the ends meet. Measure that length in millimetres — that is her finger circumference — and convert with any ring-size chart.
3. Trace a print
Press one of her rings flat into a soft surface (a pad of paper, foam, even soap). The indent shows the inner diameter; measure across in millimetres.
4. Recruit a friend
Her sister, best friend or mother. Ask one of them to take her shopping for a non-engagement piece and quietly get her size measured.
5. Order a Montare ring sizer (best fallback)
We send a free plastic ring-sizer kit anywhere in Canada. Try it on your own finger first to learn the scale, then find an excuse for her to try one on. Order one from our ring sizer page.
Which method to use
| Method | Stealth | Reliability |
|---|---|---|
| Borrow a ring | High | High |
| String / floss | High | Medium |
| Trace a print | High | Medium |
| Recruit a friend | Medium | High |
| Montare ring sizer | Medium | High |
If you get it wrong
Every Montare ring includes one free resizing within the first 60 days, plus our lifetime upgrade programme. A half-size off is easily fixed; the design and the diamond are the decisions that matter, and you can plan both in the ring builder or with a consultation.
Frequently asked questions
What is the average women's ring size?
Most women's ring sizes fall between US 5.5 and 7, with 6 to 6.5 the most common. If you have no measurement at all, 6.5 is a sensible default to size from.
How can I measure her ring size secretly?
Borrow a ring she already wears and trace or measure its inner diameter, or wrap string around her finger while she sleeps and measure the length. Both avoid asking.
What if she is between sizes?
Choose the larger size — a slightly loose ring is more comfortable and easier to resize down than up.
Can a Montare ring be resized later?
Yes. Every ring includes a free resizing within 60 days, and we support resizing beyond that as part of the lifetime programme.
Get it right. Order a free ring sizer, or design the ring in the ring builder.