How to use iit

1. Print at 100% scale
Make sure the document is printed in actual size (100%) - not scaled.

2. Use a ring you already have
Place your ring on the circles. The correct size is where the inside edge of your ring perfectly matches the circle.

What to do

Cut a strip of paper about 5 mm wide and 10 cm long. Wrap it snugly around the base of your finger and mark where it overlaps.

The length in millimeters = your finger circumference.

Match it with our conversion chart.

If you fall between two sizes, pick the smaller size.

If your knuckle is much larger than your finger base, measure both and choose the size in between.

What to do

Take a ring that fits well and measure its inside diameter. Place a ruler straight across the inside edges (mm).

Use our conversion chart to find the corresponding US size.

CONVERSION CHART

US Size Inside Diameter (mm) Circumference (mm)
6 16.51 51.9
7 17.32 54.5
8 18.14 57.0
9 18.95 59.5
10 19.76 62.1
11 20.57 64.6
12 21.39 67.2
13 22.20 69.7
14 23.01 72.3
15 23.83 74.8