Ring Size Guide

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International Ring Size Conversion Table

US/CAN UK/AUS EU Internal Diameter Circumference
3 F 44 14.1 mm 44.2 mm
3.5 G 46 14.5 mm 45.55 mm
4 H 1/2 47 14.9 mm 46.8 mm
4.5 I 1/2 48 15.3 mm 48.07 mm
5 J 1/2 49 15.7 mm 49.3 mm
5.5 K 1/2 51 16.1 mm 50.56 mm
6 L 1/2 52 16.5 mm 51.9 mm
6.5 M 1/2 53 16.9 mm 53.08 mm
7 O 54 17.3 mm 54.4 mm
7.5 P 56 17.7 mm 55.6 mm
8 Q 57 18.1 mm 57 mm
8.5 R 58 18.5 mm 58.12 mm
9 S 60 19.0 mm 59.5 mm
9.5 T 61 19.4 mm 60.94 mm
10 U 62 19.8 mm 62.1 mm
10.5 V 63 20.2 mm 63.45 mm
11 W 65 20.6 mm 64.6 mm
11.5 X 66 21.0 mm 65.97 mm
12 Y 67 21.4 mm 67.2 mm
12.5 Z 68 21.8 mm 68.49 mm
13 Z 1 70 22.2 mm 69.76 mm