RING SIZE CHARTLAKS.com Ring Size from 7-12 If you know your size, you can easily convert it in the following table below.We have all Ring2Pay sizes marked in the list in stock for you:)if you are not sure, visit a jeweler who will find out your ring size in a few minutes.You also can click to the RINGS SIZER image below to find your size. diameter (in mm) Germany(perimeter in mm) Ring2Pay (US Size) 17,0 53 7 17,2 54 7 17,6 55 7 17,8 56 8 18,0 57 8 18,5 58 8 18,8 58 9 19,0 59 9 19,2 60 9 19,5 61 10 19,9 62 10 20,1 63 10 20,5 64 11 20,6 65 11 21,0 66 11 21,1 66 12 21,3 67 12 21,6 68 12 Ring2Pay