This chart will help you determine the ring size you will require. Use a tape measure, piece of string or piece of string around your finger, where you will be wearing the ring. Mark the string or paper where it overlaps to form a full circle. Then take the marked string or paper and measure it so you can compare it with the below chart. If it is a wide band, you might wish to add one size to accommodate for the extra width.
Ring Size Inches mm
4 1-13/16 46.5
4 ½ 1-7/8 47.8
5 1-15/16 49
5 ½ 2 50.3
6 2-1/16 51.5
6 ½ 2-1/8 52.8
7 2-3/16 54
7 ½ 2-1/4 55.3
8 2-5/16 56.6
8 ½ 2-3/8 57.6
9 2-7/16 59.1
9 ½ 2-1/2 60.3
10 2-9/16 61.6
10 ½ 2-5/8 62.8
11 2-11/16 64.1
11 ½ 2-3/4 65.3
12 2-13/16 66.6
12 ½ 2-7/8 67.9
13 2-15/16 69.1
Below is another chart that will help you to determine your size using the inside diameter of the ring in millimeters. This is often a way to double check your findings from the paper method. You can also use a ring you currently wear and cross check it with the below chart.
Ring Size Inside Diameter of Ring in millimeters(mm)
3 14
4 15
5 15.5
6 16
7 17
8 18
9 19
10 20
11 20.5
12 21.5
13 22.5
14 23.5
Whenever there is any doubt you can always use a professional sizing stick or visit a local jeweler and they will often size your finger for free.
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