Lily Arkwright Ring Size Chart

Find your ring size with our International Conversion Chart

Updated 10 November 2026

Use this chart to compare ring sizes across different sizing systems. Find a size you already know in its column, then read across the same row to the UK size. The diameter column measures the space inside the ring in millimetres.

Measuring a Ring You Already Own

Choose a ring that fits the intended finger on the same hand. Measure straight across the centre of its inside opening, from one inner edge to the other, without including the metal of the band. The ring needs to be round and undamaged for this measurement to be useful.

This is a conversion reference, not a printable measuring tool. Do not judge your size by holding a ring against the image on your screen, because its displayed scale can change.

On a small screen, swipe across the chart to see every column.

International ring size conversion chart with inside diameter in millimetres and UK, European, US and other size columns.

Conversions are approximate, and charts may round them differently. A blank cell means no equivalent is given here; it does not confirm that a size is unavailable. If your measurement falls between rows, or you are choosing a substantially wider band, ask for a fitting check before ordering.

Ring size describes the fit of the band. It is separate from the carat weight or dimensions of a diamond or other gemstone.