Rings

Numerical size Letter size Diameter In Millimeters
48 H½ – I½ 15.01 – 15.28mm
50 J - K 15.61 – 15.92mm
52 L - L½ 16.40 – 16.55mm
54 M½ - N½ 16.99 – 17.19mm
56 O - P 17.58 – 17.83mm
58 P½ - Q½ 18.17 – 18.46mm
60 R½ - S 18.87 – 19.10mm

If you are still unsure, please see our online printable size guide. We also have a ring sizer available for purchase on our website.