Ring Sizing

A ring being sized at S.E. Needham Jewelers will first be cleaned of any dirt or oils in an ultrasonic followed by steam cleaning. The bottom, or shank, of the ring is then cut and filed smooth. To size a ring up, the shank is slightly opened to insert a piece of metal (gold, silver, or platinum) of the same size which is then soldered in place. To size a ring down, a small piece of metal is cut from the shank after which the shank is soldered back together. Our goldsmiths then file and sand the joints to smooth the ring to the original state. This is all finished with polishing and cleaning, as well as rhodium plating for white gold rings, and a two point inspection to check stones to make sure they are secure. The price of sizing varies depending on sizing up or down, the width of the ring, and the total number of stones in the ring.

International Ring Size Chart

United States and Canada Ring Size Diameter in Inches Diameter in Millimeters Great Britain and Australia France Germany Japan Switzerland
1 0.487 12.37 B --- --- 1 ---
1 1/4 0.495 12.573 B-1/2 --- --- --- ---
1 1/2 0.503 12.776 C --- --- --- ---
1 3/4 0.511 12.979 C-1/2 --- --- --- ---
2 0.52 13.208 D 41 1/2 13 1/4 2 1 1/2
2 1/4 0.528 13.411 D-1/2 42 1/8 13 1/2 --- ---
2 1/2 0.536 13.614 E 42 3/4 13 3/4 3 2 3/4
2 3/8 0.544 13.818 E- 1/2 43 3/8 --- --- 3 3/8
3 0.553 14.046 F 44 14 4 4
3 1/4 0.561 14.249 F-1/2 44 5/8 14 1/4 --- 4 5/8
3 1/2 0.569 14.453 G 45 1/4 14 1/2 5 5 1/4
3 3/4 0.577 14.656 G-1/2 45 7/8 14 3/4 6 5 7/8
4 0.586 14.884 H-1/2 46 1/2 15 7 6 1/2
4 1/4 0.594 15.088 I 47 1/8 15 1/4 --- 7 1/8
4 1/2 0.602 15.291 I-1/2 47 3/4 15 1/2 8 7 3/4
4 3/4 0.61 15.494 J 48 3/8 --- --- 8 3/8
5 0.619 15.723 J-1/2 49 15 3/4 9 9
5 1/4 0.627 15.926 K 49 5/8 16 --- 9 5/8
5 1/2 0.635 16.129 K-1/2 50 1/4 16 1/4 10 10 1/4
5 3/4 0.643 16.332 L 50 7/8 --- 11 10 7/8
6 0.652 16.561 L-1/2 51 1/2 16 1/2 12 11 1/2
6 1/4 0.66 16.764 M 52 1/8 16 3/4 --- 12 1/8
6 1/2 0.668 16.967 M-1/2 52 3/4 17 13 12 3/4
6 3/4 0.676 17.17 N 53 3/8 --- --- 13 3/8
7 0.685 17.399 O 54 17 1/4 14 14
7 1/4 0.693 17.602 O-1/2 54 5/8 17 1/2 --- 14 5/8
7 1/2 0.701 17.805 P 55 1/4 17 3/4 15 15 1/4
7 3/4 0.709 18.009 P-1/2 55 7/8 --- --- 15 7/8
8 0.717 18.212 Q 56 1/2 18 16 16 1/2
8 1/4 0.726 18.44 Q-1/2 57 1/8 18 1/4 --- 17 1/8
8 1/2 0.734 18.644 R 57 3/4 18 1/2 17 17 3/4
8 3/4 0.742 18.847 R-1/2 58 3/8 18 3/4 --- 18 3/8
9 0.75 19.05 S 59 19 18 19
9 1/4 0.759 19.279 S-1/2 59 5/8 19 1/4 --- 19 5/8
9 1/2 0.767 19.482 --- 60 1/4 19 1/2 19 20 1/4
9 3/4 0.775 19.685 T 60 7/8 19 3/4 --- 20 7/8
10 0.783 19.888 T-1/2 61 1/2 20 20 21 1/2
10 1/4 0.792 20.117 U 62 1/8 20 1/4 21 22 1/8
10 1/2 0.8 20.32 U-1/2 62 3/4 20 1/2 22 22 3/4
10 3/4 0.808 20.523 V 63 3/8 --- --- 23 3/8
11 0.816 20.726 V-1/2 64 20 3/4 23 24
11 1/4 0.825 20.955 W 64 5/8 --- --- 24 5/8
11 1/2 0.833 21.158 W-1/2 65 1/4 21 24 25 1/4
11 3/4 0.841 21.361 X 65 7/8 --- --- 25 7/8
12 0.849 21.565 Y 66 1/2 21 1/4 25 26 1/2
12 1/4 0.858 21.793 Y-1/2 67 1/8 21 1/2 --- 27 1/8
12 1/2 0.866 21.996 Z 67 3/4 21 3/4 26 27 3/4
12 3/4 0.874 22.2 Z-1/2 68 3/8 --- --- 28 3/8
13 0.882 22.403 --- 69 22 27 29