Sizing a ring in secret

1. Borrow a ring they wear on the same finger. Measure its inside diameter (see measuring an existing ring) and return it quickly. Check which finger they actually wear it on.
2. Ask someone who knows. A friend or relative may know a size from a previous purchase or a jeweller visit. In our tools, choose the source honestly — a size someone remembers is weighted lower than one a jeweller measured.
3. Compare to your own finger. Slide their ring onto your finger and mark where it stops, then measure that spot. This is rough and easily a size or more out.
4. Guessing from height, build or “average” sizes. We do not recommend it and our tools will not turn a guess into a confident size.

• Check the retailer offers free resizing or exchange, and for how long.
• Avoid final-sale, engraved, eternity and non-resizable metals (such as tungsten) for a surprise unless you are sure.
• If unsure between two sizes, the larger is usually easier to adjust down than a small ring is to stretch — but ask the jeweller, because this depends on the design.
• Some people propose with a placeholder ring and size the real one together afterwards.

With weak evidence, expect FitGuard™ to show lower Measurement Confidence and suggest verifying or professional confirmation before ordering. That is not a failure — it is an honest signal to choose a flexible purchase.