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Ring Size Chart in Inches, MM and International Guide

    In this guide, I will go over the different measurements of the best ring size. This circumference or diameter is usually shown in MM or inches. However, ring sizes have different designations that may vary by country. For example, think of USA, Canada, EU, UK, Australian and India sizes. So to simplify this I have collected all the information from experts and put it in these tables. In this way you can discover the ring size chart you need below! Furthermore, you will find out how to measure the ideal finger circumference.

    Ring Size Chart with international dimensions

    In this article we look at:

    Explore the different ring sizes to find the right circumference for you. Then we give tips to help you choose, because no person is the same.

    US and Canada ring size in Inches and MM

    First let’s look at the ring size chart for US and Canada from small to large. The smallest dimensions are better suited for babies and children.

    Small ring size for kids and babies

    Children’s rings usually measure from 0.5 to 5 inches. So, the diameter varies from 12 to 15 mm. That is ideal for a finger circumference of 37.8 to 48.7 mm.

    US / Canada Ring sizeCircumference in mmDiameter in mmCircumference in inchesDiameter in inches
    000031.13 mm9.91 mm1.22 inch0.39 inch
    0033.68 mm10.72 mm1.39 inch0.44 inch
    036.22 mm11.53 mm1.43 inch0,45 inch
    0.537.54 mm11.95 mm1.49 inch0.47 inch
    138.86 mm12.37 mm1.53 inch0.49 inch
    1.540.15 mm12.78 mm1.58 inch0.50 inch
    241.50 mm13.21 mm1.63 inch0.52 inch
    2.542.76 mm13.61 mm1.68 inch0.54 inch
    344.14 mm14.05 mm1.74 inch0.55 inch
    3.545.40 mm14.45 mm1.79 inch0.57 inch
    446.68 mm14.86 mm1.84 inch0.59 inch
    4.547.97 mm15.27 mm1.89 inch0.60 inch
    549.32 mm15.70 mm1.94 inch0.62 inch
    Choose the best ring size for childeren

    US ring size 0000 to 0.5 is for babies. Is your child 1 to 3 years old? Then on average people choose US size 1 to 2. Furthermore, with the age of 3 to 6 years, the best size is around 2.5. Childeren in the age of 6 to 9 years mostly choose US size 3 to 3.5. Finally, ring size 4 or 5 are great for teens in the age of 8 to 14 years.

    Average ring size for men and women

    The average ring size for men is 8.5 US size. Therefore, it will not surprise you that the average women’s ring is size 6.5 in Canada and the United States.

    US / Canada ring sizeCircumference in mmDiameter in mmCircumference in inchesDiameter in inches
    5.550.58 mm16.10 mm1.99 inch0.63 inch
    651.87 mm16.51 mm2.04 inch0.65 inch
    6.553.16 mm16.92 mm2.09 inch0.66 inch
    754.51 mm17.35 mm2.15 inch0.68 inch
    7.555.76 mm17.75 mm2.20 inch0.69 inch
    857.15 mm18.19 mm2.25 inch0.71 inch
    8.558.21 mm18.53 mm2.29 inch0.73 inch
    959.34 mm18.89 mm2.35 inch0.75 inch
    9.560.98 mm19.41 mm2.40 inch0.76 inch
    1062.33 mm19.84 mm2.45 inch0.78 inch
    10.563.46 mm20.20 mm2.50 inch0.79 inch
    1164.97 mm20.68 mm2.56 inch0.81 inch
    11.566.22 mm21.08 mm2.61 inch0.83 inch
    1267.51 mm21.49 mm2.66 inch0.85 inch
    12.568.77 mm21.89 mm2.71 inch0.86 inch
    1370.15 mm22.33 mm2.76 inch0.88 inch

    Big ring sizes in US and Canada

    Last but not least, big ring sizes are also available. Usually this goes up to size 16 which has a circumference of 3.07 Inches and a diameter of 0.98 Inches.

    US / Canada ring sizeCircumference in mmDiameter in mmCircumference in inchesDiameter in inches
    13.571.00 mm22.60 mm2.80 inch0.89 inch
    1472.76 mm23.16 mm2.86 inch0.91 inch
    14.573.98 mm23.55 mm2.91 inch0.93 inch
    1575.40 mm24 mm2.97 inch0.94 inch
    15.576.69 mm24.41 mm3.02 inch0.96 inch
    1678 mm24.83 mm3.07 inch0.98 inch

    EU ring sizes circumference and diameter in MM

    In Europe there are different countries with different size charts. You will find them below. Do you want the official ISO 8653:2016 standard? You can buy it through the link.

    Complete EU size chart

    EU ring size – FranceCircumference in mmDiameter in mm
    3737 mm11,78 mm
    3838 mm12,09 mm
    38.538,5 mm12,25 mm
    3939 mm12,41 mm
    4040 mm12,73 mm
    4141 mm13,05 mm
    4242 mm13,37 mm
    42.542,41 mm13,50 mm
    4343 mm13,69 mm
    4444 mm14,01 mm
    4545 mm14,32 mm
    4646 mm14,64 mm
    4747 mm14,96 mm
    4848 mm15,28 mm
    4949 mm15,60 mm
    5050 mm15,92 mm
    5151 mm16,23 mm
    5252 mm16,55 mm
    52.552,46 mm16,70 mm
    5353 mm16,87 mm
    5454 mm17,19 mm
    5555 mm17,56 mm
    5656 mm17,83 mm
    5757 mm18,14 mm
    57.557,50 mm18,30 mm
    5858 mm18,46 mm
    5959 mm18,78 mm
    6060 mm19,10 mm
    6161 mm19,42 mm
    6262 mm19,74 mm
    6363 mm20,05 mm
    6464 mm20,37 mm
    6565 mm20,69 mm
    6666 mm21,01 mm
    6767 mm21,33 mm
    67.567,50 mm21,49 mm
    6868 mm21,65 mm
    6969 mm21,96 mm
    7070 mm22,28 mm
    7171 mm22,60 mm
    7272 mm22,92 mm
    7373 mm23,24 mm
    74.574,5 mm23,70 mm
    7575 mm23,90 mm
    7676 mm24,19 mm

    EU – Swiss / German ring size chart

    However, many countries also measure with the German dimensions. They are shown below to give you a complete picture.

    Swiss / German ring sizeCircumference in mmDiameter in mm
    1237,80 mm12 mm
    12.539,30 mm12,5 mm
    1340.84 mm13 mm
    13.542.41 mm13,5 mm
    1443.98 mm14 mm
    14.545,55 mm14,5 mm
    1547,12 mm15 mm
    15.548,69 mm15,5 mm
    1650,27 mm16 mm
    16.551,87 mm16,5 mm
    1753,41 mm17 mm
    17.554,98 mm17,5 mm
    1856,55 mm18 mm
    18.558,12 mm18,5 mm
    1959,69 mm19 mm
    19.561,26 mm19,5 mm
    2062,83 mm20 mm
    20.564,40 mm20,5 mm
    2165,97 mm21 mm
    21.567,51 mm21,5 mm
    2269,12 mm22 mm
    22.570,69 mm22,5 mm
    2372,26 mm23 mm
    23.573,83 mm23,5 mm
    2475,40 mm24 mm
    24.577,00 mm24,5 mm
    2578,54 mm25 mm

    Britain UK ring size chart

    Britain ring sizeCircumference in mmDiameter in mm
    A37.80 mm12.04 mm
    B39.10 mm12.45 mm
    C40.40 mm12.85 mm
    D41.70 mm13.26 mm
    E42.90 mm13.67 mm
    F44.20 mm14.07 mm
    G45.50 mm14.48 mm
    H46.80 mm14.88 mm
    I48.00 mm15.29 mm
    J48.70 mm15.49 mm
    K50.00 mm15.90 mm
    L51.20 mm16.31 mm
    M52.50 mm16.71 mm
    N53.80 mm17.12 mm
    O55.10 mm17.53 mm
    P56.30 mm17.93 mm
    Q57.60 mm18.34 mm
    R58.90 mm18.75 mm
    S60.20 mm19.15 mm
    T61.40 mm19.56 mm
    U62.70 mm19.96 mm
    V64.00 mm20.37 mm
    W65.30 mm20.78 mm
    X66.60 mm21.18 mm
    Y67.80 mm21.59 mm
    Z68.50 mm21.79 mm

    Asian ring dimensions chart (Japan, China, Hong Kong, Taiwan, Singapore, Macau)

    Asian ring size
    Japan, China, Hong Kong, Taiwan, Singapore, Macau
    Circumference in mmDiameter in mm
    037.80 mm12.04 mm
    140.84 mm13 mm
    241.88 mm13.33 mm
    342.91 mm13.66 mm
    443.98 mm14 mm
    545.02 mm14.33 mm
    646.06 mm14.66 mm
    747.12 mm15 mm
    848.16 mm15.33 mm
    949.20 mm15.66 mm
    1050.27 mm16 mm
    1151.30 mm16.33 mm
    1252.34 mm16.66 mm
    1353.41 mm17 mm
    1454.44 mm17.33 mm
    1555.48 mm17.66 mm
    1656.55 mm18 mm
    1757.59 mm18.33 mm
    1858.62 mm18.66 mm
    1959.69 mm19 mm
    2060.73 mm19.33 mm
    2161.76 mm19.66 mm
    2262.83 mm20 mm
    2363.87 mm20.33 mm
    2464.91 mm20.66 mm
    2565.97 mm21 mm
    2667.01 mm21.33 mm
    2768.05 mm21.66 mm
    2869.12 mm22 mm
    2970.15 mm22.33 mm
    3071.19 mm22.66 mm
    3172.26 mm23 mm
    3273.29 mm23.33 mm
    3374.33 mm23.66 mm
    3475.40 mm24 mm
    3576.43 mm24.33 mm
    3677.47 mm24.66 mm
    3778.54 mm25 mm

    Last but not least, do you find this article informative? Please share!

    Furthermore, you can also read more about other jewelry sizing.

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