RING SIZE GUIDE INSTRUCTION: PRINT THIS PAGE IN A4 SIZE AND SCALED TO 100% . TO CHECK THE ACCURACY OF YOUR PRINT, SIMPLY PLACE A CREDIT CARD OVER THE LINE BELOW, THEY SHOULD MATCH UP EXACTLY IN ORDER TO USE THIS SIZE CHART PROPERLY.

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 US DIAMETER CIRCUMFERENCE
4 15 mm 47.1 mm
5 15.8 mm 49.6 mm
6 16.5 mm 51.8 mm
7 17.2 mm 54 mm
7.5 17.9 mm 56.2 mm
8.5 18.5 mm 58.1 mm
9 19.1 mm 60 mm
10 19.8 mm 62.2 mm
10.5 20.3 mm 63.8 mm
11.5 21 mm 66 mm
12 21.6 mm 67.9 mm
13 22.3 mm 70.1 mm