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Size guide

Measure a ring you already own

You’ll need a ring that fits the intended finger and a ruler.

  1. Measure straight across the inside of the ring, from inner edge to inner edge. Do not include the ring’s walls.
  2. Find that inside diameter in millimetres in the chart below.
Read the full guide

Measure your finger

You’ll need paper or string, a ruler, a pen and scissors.

  1. Cut a strip long enough to wrap around your finger.
  2. Wrap it around the base of the finger where the ring will sit.
  3. Mark where the ends overlap, then lay the strip flat.
  4. Measure to the mark in millimetres. This is your circumference; match it to the chart.
Read the full guide

Use the STRIKE Go conversion chart below. Available sizes depend on the ring model.

US sizeDiameter (mm)Circumference (mm)
616.5151.9
717.3254.5
818.1457
918.9559.5
1019.7662.1
1120.5764.6
1221.3967.2
1322.269.7
1423.0172.3
Get help choosing a ring size

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