How to measure your ring size at home.

Ring Size Guide

(A) Measure My Ring Size:

(B) Measure My Finger Size:


  1. Make sure the ring fits the intended finger.
  2. Calculate the ring’s internal diameter (in mm). Make sure the 0mm point is where the ruler begins.

Use the size chart to determine your ring size.

Internal Diameter (mm) US/CAN UK/AUS German
14.1mm 3 F 14
14.9mm 4 H 15
15.7mm 5 J 15 3/4
16.5mm 6 N 16 1/2
17.3mm 7 P 17 1/4
18.1mm 8 R 18
19mm 9 T 19
19.8mm 10 V 20
20.6mm 11 F 20 3/4
21.4mm 12 X 21 1/4
22.2mm 13 Z 22


  1. Cut a thin strip of paper and make sure it is not too wide with respect to your finger width.
  2. At the desired part for your ring, wrap the paper strip around your finger. To get the optimum fit, make sure the paper is pulled snugly against your finger—the tighter, the better.
  3. Mark the intersection of the paper and use a ruler to measure the distance (mm).

Use the size chart to determine your ring size.

Circumference (mm) US/CAN
44.2mm 3
46.8mm 4
49.3mm 5
51.9mm 6
54.4mm 7
57.0mm 8
59.5mm 9
62.1mm 10
64.6mm 11
67.2mm 12
67.7mm 13

Tips for measuring:

  1. When your fingers are at their widest at the end of the day, measure your ring size.
  2. Take into account the band's breadth; a thick band will feel more restrictive than a thin one, so you might wish to order a whole size bigger than your typical ring size.
  3. When your hands are chold, they may have shrunk by up to half their size, so avoid measuring them then.
  4. After cocktails and appetizers, avoid measuring your ring size because alcohol and salt might cause your fingers to swell.