Finding the right size for a ring or band can be simple. Use our easy guide to determine a comfortable fit.



The optimal ring size should fit comfortably on the finger all day and in different climates. The wearer should be able to put on the ring or band effortlessly over the knuckle. Moreover, the ring should not fall off when shaking the hand or when the hand faces downward.

If your ring can swell in warmer weather, we suggest going a quarter size up. At With Clarity, we offer rings and bands in all common sizes along with half and quarter sizes. Shop with confidence!

Common Ring Sizes

Women’s ring sizes typically range from 3 to 9 within the United States. The most common women’s ring sizes are from size 6 to 7. The most popular men’s U.S. ring size is size 9.


MM measurements are derived from the inner circumference.

Inside Circumference US/Canada British/Irish/Australian Japanese French German
Inches MM
1.840 46.8 4 H 7 46 1/2 15
1.890 48.0 4.5 I 1/2 8 47 3/4 15 1/2
1.940 49.3 5 J 1/2 9 49 15 3/4
1.990 50.6 5.5 K 1/2 10 50 1/4 16 1/4
2.041 51.8 6 L 1/2 11 51 1/2 16 1/2
2.091 53.1 6.5 M 1/2 13 52 3/4 17
2.141 54.4 7 N 1/2 14 54 17 1/4
2.192 55.7 7.5 O 1/2 15 55 1/4 17 1/2
2.242 56.9 8 P 1/2 16 56 1/2 18
2.292 58.2 8.5 Q 1/2 17 57 3/4 18 1/2
2.342 59.5 9 R 1/2 18 59 19
2.393 60.8 9.5 S 1/2 19 60 1/4 19 1/2
2.443 62.1 10 T 1/2 20 61 1/2 20
2.493 63.3 10.5 U 1/2 22 62 3/4 20 1/2
2.543 64.6 11 V 1/2 23 64 20 3/4
2.594 65.9 11.5 W 1/2 24 65 1/4 21
2.644 67.2 12 X 1/2 25 66 1/2 21 1/4
2.694 68.4 12.5 Z 26 67 3/4 21 3/4
2.744 69.7 13 Z 1 27 69 22
2.795 71 13.5 Z 2 29
2.845 72.3 14 Z 3 31
2.895 73.5 14.5 Z 4 32
2.945 74.8 15 Z 5 33
2.996 76.1 15.5 Z 6
3.046 77.4 16 Z 7
3.096 78.6 16.5 Z 8
3.146 79.9 17 Z 9
3.197 81.2 17.5
3.247 82.5 18
3.297 83.7 18.5
3.347 85.0 19
3.397 86.3 19.5
3.448 87.6 20

Engagement Ring Resizing

Most rings and bands can be resized within a few sizes. At With Clarity, we offer complimentary resizing for engagement rings and wedding bands within 30 days of receipt.

While it is typically okay to move a few sizes up or down, try to stay within two finger sizes. Resizing a ring or band any more than two finger sizes can be difficult. When choosing a ring size for yourself or a loved one, it may be a good idea to choose a slightly larger size.



Are you planning a surprise proposal or ring gift? There are a few ways to find ring size without spoiling the sweet gesture.


Simply ask your partner. If they know that you are about to propose, you can still surprise her with the ring style and center stone and in the process ensure that the ring is a perfect fit.


Discreetly take a ring they currently own and recently wore on the ring finger. Then take it to a local jewelry repair shop. They can quickly and easily tell you the ring size. Remember! Ensure the ring you’re measuring is typically worn on the ring finger.


Take a string and measure the inside diameter of a ring they wear on their ring finger. Or wrap it around their ring finger while they are sleeping. Measure the inside portion of the ring and compare it to the chart below. Once you have determined the millimeter diameter, compare it to the sizing chart below to find the right size


Enlist the help of a close friend or family member to try and get the information about their ring size. Just be sure that they’re not giving the surprise away. They can find out the size for you and let you know before making the purchase.

See our printable sizing guide to make finding the right size an easy process for your band or ring. See our expert gemologist advice for more on finger sizing while keeping your surprise.

Popular Engagement Ring FAQ’s

How do I know what size engagement ring to buy?

On this page, within the section called “Finding the Best Ring Size,” go through the four methods to know your size. Pro-tip: We recommend measuring the finger at moderate temperature and during mid-day. When cold or in the morning, fingers can be smaller. If you already have finger measurements, review our ring sizer chart!

What is the average engagement ring size?

For women, the average engagement ring size in the United States falls within size 6 to 7. Whereas for men, the average ring size in the United States is around size 9.

How do I choose an engagement ring?

First, establish a budget that’s comfortable for you and/or your partner. Based on your budget, list out your priorities based on gemstone type, cut grade, color grade, clarity grade, and carat weight.

Based on our most asked and purchased diamond shapes, our most popular are round, oval, emerald, and cushion shapes. These shapes are versatile and are a great go-to pick for any wearer. However, don't pick something based solely on popularity!

When it comes to the best diamond shape for you, our gemologists suggest studying your hands. Do you want to lengthen the look of your fingers? Try an oval, pear, or marquise cut. Do you want to make your hands look softer? Try wearing shapes like a cushion or round.

An extra tip when deciding the shape is to match it to the wearer’s personality/essence and style. Want personal recommendations from our gemologists? Fill out our brief form and get suggestions straight to your inbox: Match Me to a Ring

How to wear an engagement ring and wedding band?

Tradition calls to position the wedding band or ring closest to your heart (or wrist), and then the engagement ring stacks on top. The reason is, wedding rings are symbolic of your perpetual commitment, and therefore, should be closer to the heart. Nowadays, when it comes to ring stacking, there aren’t any rules. We know of people who have

Can I get my ring resized?

Definitely! Don’t worry, all of our custom wedding bands and engagement rings include complimentary resizing. At With Clarity we offer ring resizing within 30 days of receipt. Ship back your ring or band via Fedex 2-day with our provided label, and we’ll get it sorted for you. To get started, and for more information, contact us through chat, email, or phone call.

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