Ring Size Page


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This chart is for checking your ring size with, but the best way is for you go to a Jeweler and get them to measure a ring that you are wearing or have them take a measurement of your finger.


All sizes are approximate equivalents
U.S. &
Canadian
Standard
Inside
Diameter
mm/inches
Inside
Circumference
mm/inches
Equivalents
British French German
1 & 1/2 12.78 / .503 40.20 / 1.580 C 40 & 1/2 12 & 3/4
1 & 3/4 13.10 / .514 41.00 / 1.614 C & 1/2
2 13.21 / .520 41.50 / 1.634 D 41 & 1/2 13 1/4
2 & 1/4 13.50 / .530 42.30 / 1.664 D & 1/2 42 & 1/8 13 1/2
2 & 1/2 13.61 / .536 42.70 / 1.684 E 42 & 3/4 13 3/4
2 & 3/4 13.90 / .546 43.50 / 1.714 E & 1/2 43 & 3/8
3 14.04 / .553 44.00 / 1.739 F 44 14
3 & 1/4 14.30 / .562 44.80 / 1.765 F & 1/2 44 & 5/8 14 & 1/4
3 & 1/2 14.45 / .569 45.20 / 1.788 G 45 & 1/4 14 & 1/2
3 & 3/4 14.70 / .578 46.10 / 1.815 G & 1/2 45 & 7/8 14 & 3/4
4 14.86 / .585 46.50 / 1.836 H 46 & 1/2 15
4 & 1/4 15.10 / .594 47.40 / 1.865 I 47 & 1/8 15 & 1/4
4 & 1/2 15.30 / .602 48.00 / 1.890 I & 1/2 47 & 3/4 15 & 1/2
4 & 3/4 15.50 / .610 48.70 / 1.915 J 48 & 3/8
5 15.70 / .618 49.00 / 1.941 J & 1/2 49 15 & 3/4
5 & 1/4 15.90 / .625 49.90 / 1.966 K 49 & 5/8 16
5 & 1/2 16.10 / .634 50.20 / 1.992 K & 1/2 50 & 1/4 16 & 1/4
5 & 3/4 16.30 / .642 51.20 / 2.016 L 50 & 7/8
6 16.51 / .650 51.50 / 2.042 L & 1/2 51 & 1/2 16 & 1/2
6 & 1/4 16.70 / .658 52.50 / 2.066 M 52 & 1/8 16 & 3/4
6 & 1/2 16.90 / .666 53.10 / 2.091 M & 1/2 52 & 3/4 17
6 & 3/4 17.10 / .674 53.80 / 2.116 N 53 & 3/8
7 17.35 / .683 54.00 / 2.146 N & 1/2 54 17 & 1/4
7 & 1/4 17.50 / .690 55.00 / 2.167 O 54 & 5/8
7 & 1/2 17.63 / .699 55.30 / 2.196 O & 1/2 55 & 1//2 17 & 1/2
7 & 3/4 17.90 / .706 56.30 / 2.217 P 55 & 7/8
8 18.19 / .716 56.60 / 2.249 P & 1/2 56 & 3/4 18
8 & 1/4 18.30 / .722 57.60 / 2.267 Q 57 & 1/8 18 & 1/4
8 & 1/2 18.59 / .732 57.80 / 2.292 Q & 1/2 58 18 & 1/2
8 & 3/4 18.70 / .738 58.90 / 2.317 R 58 & 3/8 18 & 3/4
9 18.90 / .746 59.50 / 2.342 R & 1/2 59 19
9 & 1/4 19.20 / .754 60.10 / 2.368 S 59 & 5/8 19 & 1/4
9 & 1/2 19.40 / .762 60.80 / 2.393 S & 1/2 60 & 1/4 19 & 1/2
9 & 3/4 19.60 / .770 61.40 / 2.418 T 60 & 7/8 19 & 3/4
10 19.80 / .778 62.10 / 2.442 T & 1/2 61 & 1/2 20
10 & 1/4 20.00 / .786 62.70 / 2.468 U 62 & 1/8 20 & 1/4
10 & 1/2 20.20 / .794 63.30 / 2.493 U & 1/2 62 & 3/4 20 & 1/2
10 & 3/4 20.40 / .802 64.00 / 2.518 V 63 & 3/8
11 20.60 / .810 64.60 / 2.543 V & 1/2 64 20 & 3/4
11 & 1/4 20.80 / .818 65.20 / 2.569 W 64 & 5/8
11 & 1/2 21.00 / .826 65.90 / 2.594 W & 1/2 65 & 1/4
11 & 3/4 21.20 / .834 66.50 / 2.619 X 65 & 7/8
12 21.40 / .842 67.20 / 2.644 X & 1/2 66 & 1/2
12 & 1/4 21.60 / .850 67.80 / 2.669 Y 67 & 1/8
12 & 1/2 21.80 / .858 68.40 / 2.694 Z 67 & 3/4
12 & 3/4 22.00 / .866 69.10 / 2.719 Z & 1/2 68 & 3/8
13 22.20 / .874 69.70 / 2.744 69


Reality Check

Rings and gauges are hard metal objects that can be measured exactly, but your finger is flesh and bone and your finger is not round and it cannot be measured with the same degree of accuracy as the ring.

At the end of the day, the right ring is one that will stay on comfortably. Average ring finger sizes may be useful as a point of reference for people who are not very good at taking measurements. These are offered to help you know if your calculations are reasonable.

Jeweler's Finger Gauge Rings.

Narrow rings are the most common, but if you are buying a wider ring it is best to try a wider set like the one's shown on the left, or
anticipate that you will need a quarter or half size larger if the finger is sized using narrow sizing rings. The dash marks following every other number on the rings indicate half sizes 7- = 7 1/2

Average adult women size 6 to 8 or L & 1/2 to P & 1/2
Most American jewelers get women's samples in size 7

Average adult man size 9 to 11 or R & 1/2 to V & 1/2
Most American jewelers get men's samples in size 10.

Finger sizes sometimes do not correspond to body size. Finger sizes also are prone to change with temperature, humidity, exercise, what you have been eating, time of day, time of the month, pregnancy and other factors.

Dominant hand is usually 1/2 size larger, so if you are right handed and have a size 7 ring that fits the left hand it is reasonable to guess that a 7 1/2 will fit the right hand.
Quarter sizes are offered to help you get the best fit, however quarter sizes make more difference on smaller fingers than on large fingers.

The best size is usually the ring that fits snugly and gives a little resistance when you take it off. Wider rings should be a little looser that narrow rings.

Men take note that if you are not used to wearing a ring, the proper size will probably feel tight a first. Many men loose their wedding rings because they choose sizes that are too loose.


There are two common methods of reading a ring gauge, also called a sizing mandrel or sizing stick.

This ring is a 10 1/2 if sized by the true diameter method or 10 1/4 if sized by the center line method. True diameter method.

The mark is read at the point at which the wider side of the taper meets the edge of the ring. Wide rings are occasionally tapered and the smaller of the edges of the ring
should be taken as the true size since this is the diameter of the largest finger that can fit into it.

The center line method, Internet Opals uses this.
Using this method the mark at the center of the ring is judged to be the size. Using this method a wider ring will be measured at a size slightly smaller than it's true diameter, due to the taper of the sizing gauge.

This method automatically compensates somewhat for the fact that on the same finger a wider ring will fit tighter. If the ring is narrow, 3mm or less, the difference between the two methods is negligible.

Wider rings gauged by these two methods will be called a slightly smaller size if the center line method is used.

Because a ring size is a definition of diameter we think that it is proper that a ring actually measures the true diameter rather than contain a fudge factor for width. Your local jeweler may disagree, but calibration of gauges from different manufacturers may also disagree.

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