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Ring size chart

Download and print our handy ring sizing chart
Find standard U.S. and U.K. ring sizes plus inside diameter measurements and inside circumference measurements in this quick-reference chart. Also, learn how to calculate the length of metal sheet you'll need to make ring bands.
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To determine the length of a metal blank needed to make a ring, you need to know the inside diameter of the desired ring size, the gauge (thickness of the metal), and the width of the metal.

For bands up to 4 mm wide, and between 24 gauge (0.5 mm) and 12 gauge (2.1 mm), you can use the following formula to calculate the ring blank length:

Ring blank length (mm) = inside diameter (mm) + metal thickness (mm) x 3.14

For bands wider than 4 mm, add 0.5 mm to the length of the blank.
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