A comfortable ring should pass over the knuckle with gentle resistance and sit securely without pinching. The best starting point is a professional measurement of the finger on which you will wear it.

Measure with the right tools

Visit a jeweler and try a set of ring sizers. Tell them the approximate width and shape of the band you plan to order. A wide, flat band can fit differently from a narrow rounded one, even when both carry the same nominal size.

A well-fitting existing ring can also be checked on a jeweler’s mandrel or measured accurately across its inside diameter. It should fit the same finger and have a comparable width. Do not include the metal walls in a diameter measurement.

Always name the sizing system

A number alone is not enough. Send us, for example, “US size 7” or “17.5 mm inner diameter,” rather than just “7” or “17.5.” US, UK and circumference-based systems are different. We will confirm the requested size in the order specification.

For a circular ring, inner circumference is approximately inner diameter × 3.1416. This explains the relationship between millimeter measurements; it is not a substitute for trying on a sizer or a guarantee of fit.

Allow for real-life fit

Measure when your hands are at a normal temperature. Very cold hands, heat, exercise and swelling can affect the result. Repeat the measurement if your size varies. Tell us about a large knuckle, several rings worn together or a particularly wide band.

There is no universal rule to add half a size to every wide ring. Try a similar-width sizer and discuss the design with us.

Methods to treat cautiously

String, paper strips, phone apps and photographs against a ruler can introduce enough error to matter. Printable guides depend on correct print scaling. Use them only as rough checks, not the sole measurement for a made-to-order ring.

A ring as a gift

A borrowed ring only helps if it fits the intended finger. If the size is uncertain, contact us before committing to production. Some designs are difficult or impossible to resize without changing their appearance or setting.

Send your measurements to Skyvory and read Resizing & Repairs before ordering.