RING SIZES CHART

US Diam
inches		 Diam
mm		 Circ
inches		 Circ
mm		 British
1/2 15/32 11.95 1 31/64 37.60 A
1 31/64 12.37 1 17/32 38.90 B
1 1/2 1/2 12.78 1 37/64 40.20 C
2 33/64 13.21 1 41/64 41.50 D
2 1/2 17/32 13.61 1 11/16 42.70 E
3 35/64 14.05 1 47/64 43.40 F
3 1/2 9/16 14.45 1 25/32 44.90  
4 37/64 14.86 1 27/32 46.50 H 1/2
4 1/2 19/32 15.27 1 57/64 47.80 I 1/2
5 5/8 15.70 1 15/16 49.00 J 1/2
5 1/2 41/64 16.10 1 63/64 50.30 L
6 21/32 16.51 2 3/64 51.50 M
6 1/2 43/64 16.92 2 3/32 52.80 N
7 11/16 17.35 2 9/64 54.00 O
7 1/2 45/64 17.75 2 13/64 55.30 P
8 23/32 18.19 2 1/4 56.60 Q
8 1/2 47/64 18.53 2 19/64 57.80  
9 3/4 18.89 2 11/32 59.10  
9 1/2 49/64 19.41 2 13/32 60.60  
10 25/32 19.84 2 29/64 62.20 T 1/2
10 1/2 51/64 20.20 2 1/2 63.10 U 1/2
11 13/16 20.68 2 9/16 64.30 V 1/2
11 1/2 53/64 21.08 2 39/64 65.70  
12 27/32 21.49 2 21/32 67.90 Y
12 1/2 55/64 21.89 2 45/64 68.50 Z
13 7/8 22.33 2 49/64 70.10