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Gemspedia >> Jewellery >> Ring Sizing Guide

Ring Sizing Guide

A ring should fit comfortably in the finger of the wearer as well as it should be tight enough which will prevent it from accidentally falling off. The best and most accurate way to measure a ring size is by visiting a local jeweler. Jewelers use a set of graduated rings and other specialized tools to determine ring size. Ring size can also be measured easily at home by any of the following ways:

 

Ring Size Measurement by Ring’s Diameter


The diameter of a ring can be measured by the distance across the middle inside. You can use below given ring size circles based on ring’s diameter for measuring your exact ring size. Please follow the steps to get the accurate ring size:

  1. Select a ring that fits comfortably in the figure for which you are intended to know the size. 
  2. Take a printout of the below given figure A as per the given print instructions. 
  3. Place that ring over the circles to match with nearest circle size to find the inside size of the ring. 
  4. If the ring falls in between two sizes then it is advisable to go for the larger size.

 

Ring Size Measurement by Ring’s Circumference

The circumference of a ring can be measured by its length around the inner circle. You can use below given finger size strip for measuring your exact ring size. Please follow the steps to get the accurate ring size:

 

Print Instructions

To get the accurate ring size results, please follow these print instructions:

  • You must make sure that you do not have ‘Shrink oversized pages to fit paper size’ or ‘Expand small pages to paper size’ selected in the Print Dialog Box. 
  • You must also make sure that you have taken printouts without changing image size either intentionally or unintentionally. 
  • You can verify the sizes of the image printouts by measuring them with a ruler.

Tips for Measuring Accurate Ring Size

  • You should avoid measuring cold fingers as this is when fingers are at their smallest size. 
  • You should measure your finger in warm temperatures at the end of the day. 
  • If your ring size falls in between two ring sizes then it is advisable to go for the larger size.

Tips, if you’re buying the Ring as a Surprise

  • You should ask your intended recipient’s mother or one of the friends if they know his / her finger size. 
  • You can also borrow your intended recipient’s best fitted ring and find out the ring size by using above mentioned diameter method.

Other Tips and Information

  • Engagement and wedding rings are traditionally worn on the ring finger on the left hand. The ring finger is located between the little finger and the middle finger. 
  • Ring sizes are expressed differently in different countries. All sizes listed in the above images and in tips are standard American Sizes. 
  • The average adult woman’s ring size is ranged in between 5 to 7 whereas the average adult man’s ring size is ranged in between 9 to 11.

Conversion Chart for Ring Sizes


The following chart will be useful in conversion of measured ring size in inches or in millimeters to numbered size applicable in USA and Canada. This chart also shows ring sizes applicable in UK, Ireland, Australia, Japan and Switzerland.

 

Ring Sizes Measured Sized
USA & Canada UK, Ireland & Australia Japan Switzerland Inside Diameter Inside Circumference
Inches Millimeters Inches Millimeters
0       0.458 11.63 1.44 36.5
1/4       0.466 11.84 1.46 37.2
1/2 A     0.474 12.04 1.49 37.8
3/4 A 1/2     0.482 12.24 1.51 38.5
1 B 1   0.49 12.45 1.54 39.1
1 1/4 B 1/2     0.498 12.65 1.56 39.7
1 1/2 C     0.506 12.85 1.59 40.4
1 3/4 C 1/2     0.514 13.06 1.61 41.0
2 D 2 1.5 0.522 13.26 1.64 41.7
2 1/4 D 1/2     0.53 13.46 1.67 42.3
2 1/2 E 3 2.75 0.538 13.67 1.69 42.9
2 3/4 E 1/2     0.546 13.87 1.72 43.6
3 F 4 4 0.554 14.07 1.74 44.2
3 1/4 F 1/2 5 5.25 0.562 14.27 1.77 44.8
3 1/2 G     0.57 14.48 1.79 45.5
3 3/4 G 1/2 6 6.5 0.578 14.68 1.82 46.1
4 H 7   0.586 14.88 1.84 46.8
4 1/4 H 1/2   7.75 0.594 15.09 1.87 47.4
4 1/2 I 8   0.602 15.29 1.89 48.0
4 3/4 J   9 0.61 15.49 1.92 48.7
5 J 1/2 9   0.618 15.70 1.94 49.3
5 1/4 K   10 0.626 15.90 1.97 50.0
5 1/2 K 1/2 10   0.634 16.10 1.99 50.6
5 3/4 L   11.75 0.642 16.31 2.02 51.2
6 L 1/2 11 12.75 0.65 16.51 2.04 51.9
6 1/4 M 12   0.658 16.71 2.07 52.5
6 1/2 M 1/2 13 14 0.666 16.92 2.09 53.1
6 3/4 N     0.674 17.12 2.12 53.8
7 N 1/2 14 15.25 0.682 17.32 2.14 54.4
7 1/4 O     0.69 17.53 2.17 55.1
7 1/2 O 1/2 15 16.5 0.698 17.73 2.19 55.7
7 3/4 P     0.706 17.93 2.22 56.3
8 P 1/2 16 17.75 0.714 18.14 2.24 57.0
8 1/4 Q     0.722 18.34 2.27 57.6
8 1/2 Q 1/2 17   0.73 18.54 2.29 58.3
8 3/4 R   19 0.738 18.75 2.32 58.9
9 R 1/2 18   0.746 18.95 2.34 59.5
9 1/4 S   20.25 0.754 19.15 2.37 60.2
9 1/2 S 1/2 19   0.762 19.35 2.39 60.8
9 3/4 T   21.5 0.77 19.56 2.42 61.4
10 T 1/2 20   0.778 19.76 2.44 62.1
10 1/4 U 21   0.786 19.96 2.47 62.7
10 1/2 U 1/2 22 22.75 0.794 20.17 2.49 63.4
10 3/4 V     0.802 20.37 2.52 64.0
11 V 1/2 23   0.81 20.57 2.54 64.6
11 1/4 W   25 0.818 20.78 2.57 65.3
11 1/2 W 1/2 24   0.826 20.98 2.59 65.9
11 3/4 X     0.834 21.18 2.62 66.6
12 X 1/2 25 27.5 0.842 21.39 2.65 67.2
12 1/4 Y     0.85 21.59 2.67 67.8
12 1/2 Z 26 28.75 0.858 21.79 2.70 68.5
12 3/4 Z 1/2     0.866 22.00 2.72 69.1
13   27   0.874 22.20 2.75 69.7
13 1/4 Z1     0.882 22.40 2.77 70.4
13 1/2       0.89 22.61 2.80 71.0
13 3/4 Z2     0.898 22.81 2.82 71.7
14 Z3     0.906 23.01 2.85 72.3
14 1/4       0.914 23.22 2.87 72.9
14 1/2 Z4     0.922 23.42 2.90 73.6
14 3/4       0.93 23.62 2.92 74.2
15       0.938 23.83 2.95 74.8
15 1/4       0.946 24.03 2.97 75.5
15 1/2       0.954 24.23 3.00 76.1
15 3/4       0.962 24.43 3.02 76.8
16       0.97 24.64 3.05 77.4


Facts about International Ring Sizing

  • In the United States and Canada, ring sizes are specified using a numerical scale, with quarter and half sizes. 
  • In the United Kingdom, Ireland and Australia, ring sizes are specified using an alphabetical scale, with half sizes. 
  • In Japan, ring sizes are specified using a numerical scale, that only has whole sizes. 
  • In Switzerland, ring sizes are specified using a numerical scale, with quarter and half sizes. 
  • In Europe (excluding Ireland and the UK), ring sizes are specified using a numerical scale, with half sizes.

Resize your Ring

Most gold or silver rings can be resized by a skilled jeweler by way of soldering or stretching and compressing. However some rings cannot be resized due to gemstone setting, plating, shape or surface design. Usually small resizing does not give problems but more extreme resizing can noticeably impact the look and structure of your ring. Increasing the size of a ring typically requires gentle hammering and this will cause the shank of the ring to thin slightly. For decreasing or increasing the ring size, your jeweler may also remove or insert extra metal through soldering. Some jewelers do not resize platinum because of its density and strength.


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