How to Measure Your Ring Size

How to Measure Your Ring Size

If the ring you receive doesn’t fit, resizing is available — see our Ring Resize Service.

Method 1 — Use a ring you already own (Most accurate)

1. If you already know the size of a ring that fits you comfortably, just tell us that size.

If you don’t know the size of your ring, follow Method 2 to measure its inner diameter.

Method 2 — Measure the inner diameter of your ring (Second accurate)

  1. Place the ring on a ruler and read the inner diameter across the center line (mm).
  2. Match the number with the table below to find your US size.
Measure ring size by reading the ring’s inner diameter in millimeters across the center
Measure the inner diameter (mm) across the center of your ring.
Diameter (mm)US Size
14.053
14.45
14.854
15.27
15.705
16.10
16.516
16.92
17.357
17.75
18.198
18.53
18.899
19.41
19.8410
20.2010½
20.6911
21.0911½
21.4912
21.8912½
22.3313

Method 3 — Measure your finger circumference (Less accurate)

  1. Cut a paper strip no wider than 5 mm.
  2. Wrap it around the base of your finger, mark the overlap, then lay it flat and measure the length (mm).
  3. As per our guide: subtract 2 mm from the measured length to account for paper thickness, then match the value with the table below.
Measure ring size by wrapping a 5 mm paper strip around your finger and marking the overlap
Wrap a ≤5 mm paper strip, mark the overlap, measure in millimeters.
Important notes for the wrapped-paper method:
  • Using paper wider than 5 mm → readings tend to be larger than the true size.
  • Using a wide sewing tape → can introduce measurement errors.
  • Using string → elasticity (stretch/shrink) from pulling can cause inaccuracies.
Circumference (mm)US Size
43.43
44.9
46.54
47.8
49.05
50.3
51.56
52.8
54.07
55.3
56.68
57.8
59.19
60.5
62.210
63.110½
64.311
65.711½
67.912
68.512½
70.113