Ring Size Guide

Getting the correct engagement ring size is crucial to ensure the ring fits your partner comfortably and securely.


Inside Diameter Inside Circumference Sizes
MM Inches MM Inches British & Australian US & Canada French & Russian German Japanese Swiss
9.91 0.390 31.13 1.22 - 0000 - - - -
10.72 0.442 33.68 1.39 - 00 - - - -
11.53 0.454 36.22 1.43 - 0 - - - -
11.95 0.474 37.54 1.49 A 1/2 - - - -
12.18 0.482 38.26 1.51 A 1/2 3/4 - - - -
12.37 0.487 38.86 1.53 B 1 - - 1 -
12.60 0.496 39.58 1.56 B 1/2 1 1/4 - - - -
12.78 0.503 40.15 1.58 C 1 1/2 - - - -
13.00 0.512 40.84 1.61 C 1/2 1 3/4 - - - -
13.21 0.520 41.50 1.63 D 2 41 1/2 13 1/2 2 1 1/2
13.41 0.528 42.13 1.66 D 1/2 2 1/4 - - - -
13.61 0.536 42.76 1.68 E 2 1/2 42 3/4 13 3/4 3 2 3/4
13.83 0.544 43.45 1.71 E 1/2 2 3/4 - - - -
14.05 0.553 44.14 1.74 F 3 44 14 4 4
14.15 0.557 44.45 1.75 F 1/2 3 1/8 - - - -
14.25 0.561 44.77 1.76 F 3/4 3 1/4 - - - -
14.36 0.565 45.11 1.77 G 3 3/8 45 1/4 - 5 5 1/4
14.45 0.569 45.40 1.79 G 1/4 3 1/2 - 14 1/2 - -
14.56 0.573 45.74 1.80 G 1/2 3 5/8 - - 6 -
14.65 0.577 46.02 1.81 H 3 3/4 46 1/2 - - 6 1/2
14.86 0.585 46.68 1.84 H 1/2 4 - 15 7 -
15.04 0.592 47.25 1.86 I 4 1/4 47 3/4 - - 7 3/4
15.27 0.601 47.97 1.89 I 1/2 4 1/2 - 15 1/4 8 -
15.40 0.606 48.38 1.90 J 4 5/8 49 15 1/2 - 9
15.53 0.611 48.79 1.92 J 1/4 4 3/4 - - - -
15.70 0.618 49.32 1.94 J 1/2 5 - 15 3/4 9 -
15.80 0.622 49.64 1.95 K 5 1/8 50 - - 10
15.90 0.626 49.95 1.97 K 1/4 5 1/4 - - - -
16.00 0.630 50.27 1.98 K 1/2 5 3/8 - - 10 -
16.10 0.634 50.58 1.99 L 5 1/2 51 3/4 16 - 11 3/4
16.30 0.642 51.21 2.02 L 1/4 5 3/4 - - - -
16.41 0.646 51.55 2.03 L 1/2 5 7/8 - - - -
16.51 0.650 51.87 2.04 M 6 52 3/4 16 1/2 12 12 3/4
16.71 0.658 52.50 2.07 M 1/2 6 1/4 - - - -
16.92 0.666 53.16 2.09 N 6 1/2 54 17 13 14
17.13 0.674 53.82 2.12 N 1/2 6 3/4 - - - -
17.35 0.683 54.51 2.15 O 7 55 1/4 17 1/4 14 15 1/4
17.45 0.687 54.82 2.16 O 1/2 7 1/4 - - - -
17.75 0.699 55.76 2.20 P 7 1/2 56 1/2 17 3/4 15 16 1/2
17.97 0.707 56.45 2.22 P 1/2 7 3/4 - - - -
18.19 0.716 57.15 2.25 Q 8 57 3/4 18 16 17 3/4
18.35 0.722 57.65 2.27 Q 1/2 8 1/4 - - - -
18.53 0.729 58.21 2.29 Q 3/4 8 1/2 - 18 1/2 17 -
18.61 0.733 58.47 2.30 R 8 5/8 59 - - 19
18.69 0.736 58.72 2.31 R 1/4 8 3/4 - - - -
18.80 0.740 59.06 2.32 R 1/2 8 7/8 - - - -
18.89 0.748 59.34 2.35 R 3/4 9 - 19 18 -
19.10 0.752 60.00 2.36 S 9 1/8 60 1/4 - - 20 1/4
19.22 0.757 60.38 2.38 S 1/4 9 1/4 - - - -
19.31 0.760 60.66 2.39 S 1/2 9 3/8 - - - -
19.41 0.764 60.98 2.40 S 3/4 9 1/2 - 19 1/2 19 -
19.51 0.768 61.29 2.41 T 9 5/8 61 1/2 - - 21 1/2
19.62 0.772 61.64 2.43 T 1/4 9 3/4 - - - -
19.84 0.781 62.33 2.45 T 1/2 10 - 20 20 -
20.02 0.788 62.89 2.48 U 10 1/4 62 3/4 - 21 22 3/4
20.20 0.797 63.46 2.50 U 1/2 10 1/2 - 20 1/4 22 -
20.32 0.800 63.84 2.51 V 10 5/8 63 - - 23 3/4
20.44 0.805 64.21 2.53 V 1/4 10 3/4 - - - -
20.68 0.814 64.97 2.56 V 1/2 11 - 20 3/4 23 -
20.76 0.817 65.22 2.57 W 11 1/8 65 - - 25
20.85 0.821 65.50 2.58 W 1/4 11 1/4 - - - -
20.94 0.824 65.78 2.59 W 1/2 11 3/8 - - - -
21.08 0.830 66.22 2.61 W 3/4 11 1/2 - 21 24 -
21.18 0.834 66.54 2.62 X 11 5/8 66 1/4 - - 26 1/4
21.24 0.836 66.73 2.63 X 1/4 11 3/4 - - - -
21.30 0.839 66.92 2.64 X 1/2 11 7/8 - - - -
21.49 0.846 67.51 2.66 Y 12 67 1/2 21 1/4 25 27 1/2
21.69 0.854 68.14 2.68 Y 1/2 12 1/4 - - - -
21.89 0.862 68.77 2.71 Z 12 1/2 68 3/4 21 3/4 26 28 3/4
22.10 0.870 69.43 2.73 Z +1/2 12 3/4 - - - -
22.33 0.879 70.15 2.76 Z+1 13 - 22 27 -
22.60 0.890 71.00 2.80 Z+1.5 13.5 - - - -
22.69 0.893 71.28 2.81 Z+2 - - - - -
22.92 0.902 72.00 2.83 Z+2.5 - - - - -
23.06 0.908 72.45 2.85 Z+3 - - - - -
23.24 0.915 73.01 2.87 Z+3.5 - - - - -
23.47 0.924 73.73 2.90 Z+4 - - - - -
23.55 0.927 73.98 2.91 Z+4.5 - - - - -
23.87 0.940 74.99 2.95 Z+5 - - - - -
24.27 0.956 76.25 3.00 Z+6 - - - - -

 

Here's a step-by-step guide on how to get the correct engagement ring size:

  • Ask Directly:

  • If you want to maintain an element of surprise, you can try to subtly ask your partner's friends or family for their ring size. Make sure they can keep a secret if you choose to go this route.

  • Borrow an Existing Ring:

  • If your partner already wears rings, you can borrow one they don't wear often and take it to a jeweler for sizing. Make sure to pick a ring that is worn on the ring finger of the left hand, which is typically where the engagement ring will be worn.

  • Use a Ring Sizer:

  • You can purchase a ring sizer online or visit a local jewelry store to get one. It's a small, reusable tool that helps you determine your partner's ring size. Here's how to use it:

  • Slide the ring sizer onto your partner's finger (on the correct hand and finger).

  • Make sure it slides over the knuckle comfortably and comes off without difficulty.

  • Take note of the size indicated by the sizer. It's typically given in both US and international ring sizing standards (e.g., US size 7 or EU size 54).

  • Trace an Existing Ring:

  • If you can't borrow a ring, you can try this method

  • Find a ring your partner already owns and doesn't wear often.Place it on a piece of paper and trace both the inside and outside of the ring.Measure the diameter of the inside circle (in millimeters) and provide this measurement to a jeweler.

  • Ask a Friend:

  • If your partner has a close friend who is in the know, they might be able to help you find the right size discreetly.

  • Consult a Jeweler:

  • Visit a reputable jeweler and ask for their assistance in determining the correct ring size. They often have experience in estimating sizes and can provide guidance.

  • Guess Conservatively:

  • If you can't obtain an accurate size, it's generally safer to choose a slightly larger size. Resizing a ring that is too small can be more challenging than resizing a larger one.

  • Plan for Resizing:

  • If you're concerned about getting the size wrong, consider proposing with a temporary placeholder ring. After the proposal, you and your partner can visit a jeweler together to select the perfect engagement ring and get the size just right.

Remember that it's essential to keep the engagement a surprise if that's your intention. Be discreet when gathering information about the ring size to avoid spoiling the surprise. Additionally, if you're still unsure about the size, it's often a good idea to work with a jeweler who can assist you in finding the right fit for your partner.