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R I N G S I Z E C H A R T
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ROUND RINGS
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classic size | inside diameter
7 | 15.00 mm
8 | 15.30 mm
9 | 15.60 mm
10 | 15.90 mm
11 | 16.20 mm
12 | 16.60 mm
13 | 16.90 mm
14 | 17.20 mm
15 | 17.50 mm
16 | 17.80 mm
17 | 18.10 mm
18 | 18.50 mm
19 | 18.80 mm
20 | 19.10 mm
21 | 19.40 mm
22 | 19.80 mm
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