What Size Am I?

What You Will Need:

  • Piece of Paper
  • Pencil/Pen
  • Ruler
  • Scissors
what ring size am I
Required Materials

Step #1

Cut a long thin strip of paper (less than 1/2 inch wide, any length).

ring size
Cut Strip of Paper

Step #2

Wrap the strip of paper around the finger ensuring that the paper is placed just below the knuckle and mark the paper where is first overlaps.

what ring size
Mark Measurement Strip

Step #3

Lay the strip of paper flat and measure in millimeters from the start of the paper to the mark you made in step #2 (round to the nearest mm).

Measure with Ruler

Step #4

Your Ring Size Is:

Ring Size Measurements
Finger Circumference Ring Size
(cm) (mm) USA &
4.9 49.32 5 J1/2
5.2 51.83 6 L1/2
5.4 54.34 7 N1/2
5.7 57.17 8 P1/2
5.9 59.37 9 R1/2
6.2 62.20 10 T1/2
6.5 64.71 11 V1/2
6.7 66.91 12 X1/2
7.0 69.74 13 Z1/2
7.2 72.30 14 Z21/2
7.5 74.80 15 Z41/2

Keep in Mind…

  • Ring sizes are not universal across all brands and manufacturers: 
    AERA Rings uses Traditional US Ring Sizing. If ordering elsewhere, check your measurement against their sizing guide.
  • Big knuckles can affect your size: 
    If your knuckle is much larger than the base of your finger then measure both the base of your finger and your knuckle and use the average.
  • Finger size changes:
    Temperature, physical activity & medication can all affect the size of your fingers.  For an accurate measurement only measure when at room temperature and not physically active.
  • Bigger is always better:
    If you hesitate between two sizes, always go with the larger of the two. This will allow for finger swelling and future finger growth.

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