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Whether you're buying a ring as a special treat for yourself or a gift for someone else, we understand that getting the ring size right is important. This helpful ring size guide includes a ring size conversion chart and tips on how to measure the ring size. Plus, sign up to our newsletter to receive a free ring sizer card in the post.


Ring size conversion chart

Inside diameter Inside circumference UK ring size US ring size European ring size
XX Small 13.7 mm 42.9 mm E 2.75 42.75
14.1 mm 44.2 mm F 3 44.5
X Small 14.5 mm 45.5 mm G 3.5 45.25
14.9 mm 46.8 mm H 4 46.5
Small 15.3 mm 48.0 mm I 4.5 47.125
15.5 mm 48.7 mm J 4.75 48.375
15.9 mm 50.0 mm K 5.25 49.625
Medium 16.3 mm 51.2 mm L 5.75 50.875
16.7 mm 52.5 mm M 6.25 52.125
17.1 mm 53.8 mm N 6.75 53.375
Large 17.5 mm 55.1 mm O 7 54.625
17.9 mm 56.3 mm P 7.5 55.875
18.3 mm 57.6 mm Q 8 57.125
18.8 mm 58.9 mm R 8.5 58.375
X Large 19.2 mm 60.2 mm S 9 59.625
19.6 mm 61.4 mm T 9.75 60.875
20.0 mm 62.7 mm U 10.25 62.125
20.4 mm 64.0 mm V 10.75 63.375
XX Large 20.8 mm 65.3 mm W 11.25 64/625
21.2 mm 66.6 mm X 11.75 65.875
21.6 mm 67.8 mm Y 12 67.125
21.8 mm 68.5 mm Z 12.5 67.75