EU UK US MM
48 H½ - I½ 4½ - 5 15.01 - 15.28
50 J - K 5½ 15.61 - 15.92
52 L - L½ 6 - 6½ 16.40 - 16.55
54 M½ - N½ 7 16.99 - 17.19
56 O - P 7½ - 8 17.58 - 17.83
58 P½ - Q½ 8½ - 9 18.17 - 18.46
60 R½ - S 9 - 9½ 18.87 - 19.10

Alternatively, why not print out one of our ring size guides:

Argento Ring Size Guide / Pandora Ring Size Guide