The most accurate way to determine your ring size is to visit a local jeweller and have your finger professionally measured. This is particularly important when choosing rings that cannot be resized, such as certain stone-set designs.

For example, star set diamond bands cannot be resized, so it’s a good idea to try on a ring in a similar profile (such as D-shaped or flat) and in the same width (e.g. 2mm or 3mm). The width and shape of a band can significantly affect how a ring fits.

If you’re unable to visit a jeweller, you can measure your size at home using the methods below:

1. Measure an existing ring

Choose a ring that fits the intended finger well and measure the internal diameter (in millimetres). You can then use a ring size chart to match this measurement to your size.

2. Use a strip of paper or string

Wrap it snugly around your finger, mark where it overlaps, and measure the length in millimetres to find the circumference.

For a more accurate result, cut a strip of paper that is the same width as the ring you plan to purchase. Wider bands tend to fit more snugly, so this helps better reflect how the finished ring will feel.

For another simple way to measure your size at home, you can order a reusable plastic ring sizer directly from my shop.

This allows you to try the fit on your chosen finger and find a comfortable size at your own pace. It’s a particularly helpful option if you’re unsure, between sizes, or want to check how your ring size might change throughout the day.