Getting the correct wedding ring can be a bit hard as measurements differ. The following is a guide on the measurements used in the US and other countries.

### Wedding Ring Sizes in the United States

Size 0000 has a diameter of .390 inches or 9.91 mm. Size 00 is equal to .422 in or 10.72. Size 0 has a diameter of .454 in (11.53 mm). The other ring sizes are: 1/2 474 in (11.95 mm); 3/4 (482 in; .482 mm); 1 (.487 in, 12.37 mm); 1 1/4 (12.60 mm); 1 3/4 (13.00 mm) and 2 (.520 in, 13.21 mm).

Size 2 1/2 is equal to .536 in (13.61 mm); 3 (.553 in, 14.05 mm) 4 (.585 in, 14.86 mm); 5 (.618 in, 15.70 mm) and 6 (.650 in, 16.51 mm).

### Wedding Ring Sizes in the United Kingdom

Size A is .474 in (11.95 mm), while size B is .487 in (12.37 mm). Size C is equal to .503 in (12.78 mm). The other sizes are D (.520 in, 13.21 mm); E (.536 in, 13.61 mm); F (.553 in, 14.05 mm); G (14.36 mm) and H (14.65 mm).

Other sizes are I (15.04 mm), J (15.40 mm), K (15.80 mm), L (16.10 mm) and M (16.51 mm). Size N is 16.92 mm; size O is 17.35 mm and size P is .699 in or 17.75 mm. Size Q is .716 in or 18.19 mm. Size R is 18.61 mm and size S is 19.10 mm.

### Wedding Ring Sizes in France

Size 44 is equal to .553 in (14.05 mm). Size 45 1/4 is 14.36 mm. Size 46 1/2 is 14.65 mm. Size 47 3/4 is equal to 15.04. Other common ring sizes are 49 (15.40 mm), 50 (15.80 mm), 51 3/4 (.634 in or 16.10 mm) and 52 3/4 (16.51 mm). Size 54 is equivalent to .666 in or 16.92 mm. 55 1/4 is 17.35 mm; 56 1/2 is equal to 17.75 mm and 57 3/4 is equal to 18.19.

Size 59 is equivalent to 18.61 mm; 60 1/4 is equal to 19.10 mm and 61 1/2 to 19.51. Size 62 3/4 is equal to 20.02; 63 is 20.32 mm and 65, 20.76 mm.

### Wedding Ring Sizes in Germany

16 1/2 is equal to 16.51 mm; 17 is equal to .666 in or 16.92 mm; 17 1/4 is equivalent to .683 in or 17.35 mm; 17 3/4 is .699 in or 17.75 mm. Size 18 is .716 in or 18.19 mm. 18 1/2 is equivalent to .732 in or 18.53 mm. 19 is the same as .748 in and 19.41 mm. Size 20 is equal to .781 in or 19.84 mm. Size 20 1/4 is equal to 20 1/4 in and 20.20 mm. Size 20 3/4 is .814 in diameter or 20.68 mm.

When selecting a wedding ring size, it’s important you pick what is comfortable for your finger, and not just base the choice on its looks. American women’s average size is 6 and for men it is 10, but your finger may not necessarily fall in that range.

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