Ring Size Chart

When choosing a ring, it’s extremely important to pick the right size. A ring that’s too small may pinch your finger and a ring that’s too large may slip off and be lost.

Ring sizes in the UK use an alphabetical scale where ring size A is the smallest ring size and ring size Z signifies the largest ring size. Ring sizes are also available in half sizes which can be helpful if your finger is in-between sizes. The most popular ring sizes are from M to Q.

Please use the ring size chart below to check your ring size:

Inside Diameter Inside Circumference UK Ring Size
inches mm inches mm
0.474 12.04 1.49 37.8 A
0.482 12.24 1.51 38.5 A 1/2
0.49 12.45 1.54 39.1 B
0.498 12.65 1.56 39.7 B 1/2
0.506 12.85 1.59 40.4 C
0.514 13.06 1.61 41.0 C 1/2
0.522 13.26 1.64 41.7 D
0.53 13.46 1.67 42.3 D 1/2
0.538 13.67 1.69 42.9 E
0.546 13.87 1.72 43.6 E 1/2
0.554 14.07 1.74 44.2 F
0.562 14.27 1.77 44.8 F 1/2
0.57 14.48 1.79 45.5 G
0.578 14.68 1.82 46.1 G 1/2
0.586 14.88 1.84 46.8 H
0.594 15.09 1.87 47.4 H 1/2
0.602 15.29 1.89 48.0 I
0.61 15.49 1.92 48.7 J
0.618 15.70 1.94 49.3 J 1/2
0.626 15.90 1.97 50.0 K
0.634 16.10 1.99 50.6 K 1/2
0.642 16.31 2.02 51.2 L
0.65 16.51 2.04 51.9 L 1/2
0.658 16.71 2.07 52.5 M
0.666 16.92 2.09 53.1 M 1/2
Inside Diameter Inside Circumference UK Ring Size
inches mm inches mm
0.674 17.12 2.12 53.8 N
0.682 17.32 2.14 54.4 N 1/2
0.69 17.53 2.17 55.1 O
0.698 17.73 2.19 55.7 O 1/2
0.706 17.93 2.22 56.3 P
0.714 18.14 2.24 57.0 P 1/2
0.722 18.34 2.27 57.6 Q
0.73 18.54 2.29 58.3 Q 1/2
0.738 18.75 2.32 58.9 R
0.746 18.95 2.34 59.5 R 1/2
0.754 19.15 2.37 60.2 S
0.762 19.35 2.39 60.8 S 1/2
0.77 19.56 2.42 61.4 T
0.778 19.76 2.44 62.1 T 1/2
0.786 19.96 2.47 62.7 U
0.794 20.17 2.49 63.4 U 1/2
0.802 20.37 2.52 64.0 V
0.81 20.57 2.54 64.6 V 1/2
0.818 20.78 2.57 65.3 W
0.826 20.98 2.59 65.9 W 1/2
0.834 21.18 2.62 66.6 X
0.842 21.39 2.65 67.2 X 1/2
0.85 21.59 2.67 67.8 Y
0.858 21.79 2.70 68.5 Z
0.866 22.00 2.72 69.1 Z 1/2
0.882 22.40 2.77 70.4 Z1
0.898 22.81 2.82 71.7 Z2
0.906 23.01 2.85 72.3 Z3
0.922 23.42 2.90 73.6 Z

Ring Size Tip
When sizing your ring finger, make sure your finger is at room temperature for the optimum fit and measurement. If your hands are cold, your fingers may contract and you may choose a ring that is too small. Likewise, if your finger has expanded in heat or through injury, you may need to re-check your ring size in case it is too large or uncomfortable. When you choose the right ring for your finger it should last a lifetime.