How to determine your ring size

By
TDN
– May 15, 2010Posted in: Info and Resources
  • Measure your finger at room temperature, at the end of the day, because temperature and humidity can affect your ring size
  • Measure around the widest part of your finger. For e.g. if finger joints are prominent.
  • Use a piece of string or a strip of paper and wrap it around your finger.
  • Mark the point where the two ends meet.
  • Measure the string or paper to get the circumference of your finger.
  • Divide that number by 3.14 to get the diameter of your finger.
  • Look up your ring size using the table below.

    •  

    Ring Size Chart
    USA &
    Canada    		 Diameter (Inches) Great Britain France (mm) Germany Japan Switzerland
    ½ 0.462 A — — —  —
    ¾ 0.471 A-½ — — —  —
    1 0.487 B — — 1 —
    1 1/4 0.495 B-½ — — — —
    1 1/2 0.503 C — — — —
    1 3/4 0.511 C-½ — — — —
    2 0.52 D 41 1/2 13 1/4 2 1 1/2
    2 1/4 0.528 D-½ 42 1/8 13 1/2 —  —
    2 1/2 0.536 E 42 3/4 13 3/4 3 2 3/4
    2 3/4 0.544 E-½ 43 3/8 — —  3 3/8
    3 0.553 F 44 14 4 4
    3 1/4 0.561 F-½ 44 5/8 14 1/4 —  4 5/8
    3 1/2 0.569 G 45 1/4 14 1/2 5 5 1/4
    3 3/4 0.577 G-½ 45 7/8 14 3/4 6 5 7/8
    4 0.586 H-½ 46 1/2 15 7 6 1/2
    4 1/4 0.594 I 47 1/8 15 1/4 — 7 1/8
    4 1/2 0.602 I-½ 47 3/4 15 1/2 8 7 3/4
    4 3/4 0.61 J 48 3/8 — — 8 3/8
    5 0.619 J-½ 49 15 3/4 9 9
    5 1/4 0.627 K 49 5/8 16 — 9 5/8
    5 1/2 0.635 K-½ 50 1/4 16 1/4 10 10 1/4
    5 3/4 0.643 L 50 7/8 — 11 10 7/8
    6 0.652 L-½ 51 1/2 16 1/2 12 11 1/2
    6 1/4 0.66 M 52 1/8 16 3/4 —  12 1/8
    6 1/2 0.668 M-½ 52 3/4 17 13 12 3/4
    6 3/4 0.676 N 53 3/8 — — 13 3/8
    7 0.685 O 54 17 1/4 14 14
    7 1/4 0.693 O-½ 54 5/8 17 1/2 —  14 5/8
    7 1/2 0.701 P 55 1/4 17 3/4 15 15 1/4
    7 3/4 0.709 P-½ 55 7/8 — —  15 7/8
    8 0.717 Q 56 1/2 18 16 16 1/2
    8 1/4 0.726 Q-½ 57 1/8 18 1/4 —  17 1/8
    8 1/2 0.734 R 57 3/4 18 1/2 17 17 3/4
    8 3/4 0.742 R-½ 58 3/8 18 3/4 —  18 3/8
    9 0.75 S 59 19 18 19
    9 1/4 0.759 S-½ 59 5/8 19 1/4 —  19 5/8
    9 1/2 0.767 — 60 1/4 19 1/2 19 20 1/4
    9 3/4 0.775 T 60 7/8 19 3/4 —  20 7/8
    10 0.783 T-½ 61 1/2 20 20 21 1/2
    10 1/4 0.792 U 62 1/8 20 1/4 21 22 1/8
    10 1/2 0.8 U-½ 62 3/4 20 1/2 22 22 3/4
    10 3/4 0.808 V 63 3/8 — —  23 3/8
    11 0.816 V-½ 64 20 3/4 23 24
    11 1/4 0.825 W 64 5/8 — —  24 5/8
    11 1/2 0.833 W-½ 65 1/4 21 24 25 1/4
    11 3/4 0.841 X 65 7/8 — —  25 7/8
    12 0.849 Y 66 1/2 21 1/4 25 26 1/2
    12 1/4 0.858 Y-½ 67 1/8 21 1/2 —  27 1/8
    12 1/2 0.866 Z 67 3/4 21 3/4 26 27 3/4
    12 3/4 0.874 Z-½ 68 3/8 — —  28 3/8
    13 0.882 — 69 22 27 29

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