US Ring Size Guide

US Ring Size Guide

Measuring Your Ring Size

  • Using string, ribbon, a strip of paper or a flexible Measuring Tape:

  • Wrap a piece of string, ribbon, a strip of paper, or a flexible measuring tape around the base of your finger.
  • Make sure it’s snug but not too tight.
  • Mark where the ends meet and measure the length with a ruler. Compare the length you measured to the sizing chart below to determine your size.
  • For example if the pice of string you used to wrap around your finger measures 44mm or 1.73 inches, you would be a US ring size 3.

US Ring Size Chart

The measurements below represent the inside circumference of the ring.

US Size Inside Circumference (mm) Inside Circumference (inches)
3 44.2 mm 1.74 inches
3.5 45.5 mm 1.79 inches
4 46.8 mm 1.84 inches
4.5 48.0 mm 1.89 inches
5 49.3 mm 1.94 inches
5.5 50.6 mm 1.99 inches
6 51.9 mm 2.04 inches
6.5 53.1 mm 2.09 inches
7 54.4 mm 2.14 inches
7.5 55.7 mm 2.19 inches
8 57.0 mm 2.24 inches
8.5 58.3 mm 2.29 inches
9 59.5 mm 2.34 inches
9.5 60.8 mm 2.39 inches
10 62.1 mm 2.44 inches
10.5 63.4 mm 2.50 inches
11 64.6 mm 2.54 inches
11.5 65.9 mm 2.60 inches
12 67.2 mm 2.65 inches
12.5 68.5 mm 2.70 inches
13 69.7 mm 2.75 inches
13.5 71.0 mm 2.80 inches
14 72.3 mm 2.85 inches
14.5 73.6 mm 2.90 inches
15 74.8 mm 2.94 inches
15.5 76.1 mm 2.99 inches
16 77.4 mm 3.05 inches
16.5 78.7 mm 3.10 inches
17 80.0 mm 3.15 inches
17.5 81.2 mm 3.20 inches
18 82.5 mm 3.25 inches
18.5 83.8 mm 3.30 inches
19 85.1 mm 3.35 inches
19.5 86.4 mm 3.40 inches
20 87.6 mm 3.45 inches

 

Tips for Finding Your Ring Size

  • Time of Day: Your fingers can swell throughout the day, so measure them when they are at their average size (not too hot or cold).
  • Multiple Measurements: If you're unsure, measure a couple of times to confirm your size.
  • Consider Ring Width: If you're choosing a wide band ring, consider going up half a size for comfort.

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