The surest way to find your size is to measure a ring you already wear on the same finger.
## Measure a ring
Lay the ring flat and measure the inside diameter in millimetres, edge to edge. 14.9 mm is size 8, 15.7 mm is size 10, 16.5 mm is size 12, 17.3 mm is size 14, 18.1 mm is size 16 and 18.9 mm is size 18.
## Measure your finger
Wrap a strip of paper around the base of the finger, mark where it meets and measure the length. Do it in the evening, when fingers are at their largest.
## Between sizes
Choose the larger size for wide bands and the smaller for fine ones. The first resize is always free.