What is the Average Ring Size for Men and Women?

If you are purchasing a ring as a surprise gift or proposal, knowing the average sizes can help you make a close estimate. While every individual is different, standard benchmarks can serve as a helpful starting point.

Average Sizing Benchmarks

For women, the average ring size ranges from US size 5 to 7, with size 6 being the most common. This corresponds to an inside diameter of approximately 16.5 mm. For men, the average size ranges from US size 8 to 10, with size 9 being the most common, corresponding to an inside diameter of 19.0 mm.

These averages align with standard heights and weights, but variations occur based on finger shapes and knuckle widths. Sizing up slightly is generally recommended, as reducing a ring's size is easier than expanding it.

To convert these average sizes to millimeter measurements, run them through our cm to mm ring size converter. For tips on measuring a partner's finger in secret, read our guide on measuring ring size in secret.