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Ring Size Chart

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Ring Size Chart

A ring size chart is used to determine the numerical size that best fits your finger. In this guide, we’ll explain how to use a ring size chart to find your perfect fit.

In This Guide

01What Is a Ring Size?02Ring Size Conversion Chart 03Printable Ring Size Chart 04Request a Free Ring Sizer 05Brilliant Earth Ring Resizing Policy 06FAQ

Expertise you can trust: Brilliant Earth is known for its award-winning jewelry designs and seamless, innovative shopping experience. This Brilliant Earth engagement ring guide covers how to use a ring size chart to determine your perfect fit, including conversion charts, printable tools, and free sizing resources. All Brilliant Earth guides are meticulously researched and reviewed by our certified gemologists, content, editorial, and brand teams before publication to ensure industry-leading excellence and accuracy.

What Is a Ring Size?

Ring size is a number that corresponds to the inner measurement of a ring. In the United States, sizes typically range from 3 to 13 in quarter-size increments.

A well-fitting ring should feel snug yet comfortable. It should slide over the knuckle with a bit of resistance and sit securely at the base of the finger without feeling tight. The goal is a fit that feels natural and stays in place during daily activities without constriction.

Person finding their ring size with a Brilliant Earth ring sizer

Ring Size Conversion Chart

View the chart below to see how US sizes map to finger circumference and convert to international sizes.

All Brilliant Earth rings are crafted in standard US sizes. Engagement rings, wedding bands, and fashion rings for both men and women all follow the same size format.

Swipe to view more countries

Inside Circumference		US, Canada, Mexico	UK, Australia, Ireland, New Zealand, South Africa	France	Germany, Russia, Ukraine, Asia	India, China, Japan, South America, Turkey, Israel	Italy, Spain, Netherlands, Switzerland
IN	MM	US, Canada, Mexico	UK, Australia, Ireland, New Zealand, South Africa	France	Germany, Russia, Ukraine, Asia	India, China, Japan, South America, Turkey, Israel	Italy, Spain, Netherlands, Switzerland
1.74	44.2	3	F	44	14	4	4
1.77	44.8	3.25	F 1/2	45	14 1/4	---	4 5/8
1.79	45.5	3.5	G	45.5	14 1/2	5	5 1/4
1.82	46.1	3.75	G 1/2	46	14 3/4	6	5 7/8
1.84	46.8	4	H	47	15	7	6 1/2
1.87	47.4	4.25	H 1/2	47.5	---	---	7 1/8
1.89	48	4.5	I	48	15 1/4	8	7 3/4
1.92	48.7	4.75	J	48.5	15 1/2	---	8 3/8
1.94	49.3	5	J 1/2	49	15 3/4	9	9
1.97	50	5.25	K	50	16	---	9 5/8
1.99	50.6	5.5	K 1/2	50.5	16 1/4	10	10 1/4
2.02	51.2	5.75	L	51	---	11	10 7/8
2.04	51.9	6	L 1/2	52	16 1/2	12	11 1/2
2.07	52.5	6.25	M	52.5	16 3/4	---	12 1/8
2.09	53.1	6.5	M 1/2	53	17	13	12 3/4
2.12	53.8	6.75	N	54	---	---	13 3/8
2.14	54.4	7	N 1/2	54.5	17 1/4	14	14
2.17	55.1	7.25	O	55	17 1/2	---	14 5/8
2.19	55.7	7.5	O 1/2	56	17 3/4	15	15 1/4
2.22	56.3	7.75	P	56.5	18	---	15 7/8
2.24	57	8	P 1/2	57	---	16	16 1/2
2.27	57.6	8.25	Q	58	18 1/4	---	17 1/8
2.29	58.3	8.5	Q 1/2	58.5	18 1/2	17	17 3/4
2.32	58.9	8.75	R	59	18 3/4	---	18 3/8
2.34	59.5	9	R 1/2	60	19	18	19
2.37	60.2	9.25	S	60.5	19 1/4	---	19 5/8
2.39	60.8	9.5	S 1/2	61	19 1/2	19	20 1/4
2.42	61.4	9.75	T	61.5	---	---	20 7/8
2.44	62.1	10	T 1/2	62	19 3/4	20	21 1/2
2.47	62.7	10.25	U	63	20	21	22 1/8
2.49	63.4	10.5	U 1/2	63.5	---	22	22 3/4
2.52	64	10.75	V	64	20 1/2	---	23 3/8
2.54	64.6	11	V 1/2	65	20 3/4	23	24
2.57	65.3	11.25	W	65.5	---	---	24 5/8
2.59	65.9	11.5	W 1/2	66	21	24	25 1/4
2.62	66.6	11.75	X	67	21 1/4	---	25 7/8
2.65	67.2	12	X 1/2	67.5	21 1/2	25	26 1/2
2.68	68.1	12.25	Y	68	---	---	27 1/8
2.71	68.5	12.5	Z	69	21 3/4	26	27 3/4
2.72	69.1	12.75	Z 1/2	69.5	---	---	28 3/8
2.75	69.7	13	---	70	22	27	29

Inside Circumference
IN	MM
1.74	44.2
1.77	44.8
1.79	45.5
1.82	46.1
1.84	46.8
1.87	47.4
1.89	48
1.92	48.7
1.94	49.3
1.97	50
1.99	50.6
2.02	51.2
2.04	51.9
2.07	52.5
2.09	53.1
2.12	53.8
2.14	54.4
2.17	55.1
2.19	55.7
2.22	56.3
2.24	57
2.27	57.6
2.29	58.3
2.32	58.9
2.34	59.5
2.37	60.2
2.39	60.8
2.42	61.4
2.44	62.1
2.47	62.7
2.49	63.4
2.52	64
2.54	64.6
2.57	65.3
2.59	65.9
2.62	66.6
2.65	67.2
2.68	68.1
2.71	68.5
2.72	69.1
2.75	69.7

Printable Ring Size Chart

A printable ring size chart is helpful for quick reference and allows you to identify your ring size from home using a physical printout.

Print Ring Size Chart

Request a Free Ring Sizer

Ring sizer tool and rings on top of a ring box

For a more precise measurement, we'll mail you a free ring sizer. It's unisex, reusable, and designed to mimic the feel of an actual ring so you get a true sense of how each size sits on your hand.

All you have to do is wrap the sizer around the finger you'd like to measure and adjust it to the size that feels right. It's one of the most accurate ways to measure your finger before making a purchase.

Brilliant Earth Ring Resizing Policy

Our commitment to you extends beyond delivery. Here's what's included with your purchase:

Free 1-year resizes: Most designs can be resized within one year, free of charge.
Free 30-day exchanges: Most designs, including eternity, open, and alternative metal styles, can be exchanged for any new size within 30 days, free of charge.
Easy process: If you need a different size, contact us to begin the complimentary resize process. We'll confirm a new size with you and resize your ring free of charge. Please note that certain restrictions apply.

Additionally, Brilliant Earth is proud to be one of the only jewelry brands to offer inclusive sizing across our entire assortment of engagement rings, wedding bands, and fashion rings, so everyone can find the perfect fit no matter the style.

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FAQ

What size is my ring?

If you already own a ring that fits well, you can determine its size by measuring the inner circumference or by placing it on a printed ring size conversion guide. Align the inside edge of the ring with the circle that matches most closely, and the number associated with that circle indicates your size. For more ways to find your ring size, explore our How to Measure Ring Size guide.

What are ring sizes measured in?

Ring sizes are measured using the inside circumference of the ring, typically in millimeters or inches. In the United States, Canada, and Mexico, sizes are expressed as numerical values (for example, size 6 or 7.5). Other systems, such as those used in the United Kingdom, Europe, and Asia, use different scales, including letters or alternate number ranges.

How do I measure ring finger size?

To measure your ring finger size, wrap a flexible measuring tape or a thin strip of paper around the base of your finger. Mark where the ends meet, then measure the length in millimeters or inches. That measurement represents your finger circumference, which you can match to a size using a ring size conversion chart. For detailed step-by-step instructions, visit our How to Measure Ring Size guide.

How can I get my ring size?

There are several reliable ways to determine your ring size:

Use a ring size conversion chart to compare an existing ring that fits well.
Measure your finger using a string, paper strip, or flexible tape.
Order a free ring sizer for at-home precision.
Visit a jewelry store to have your finger professionally measured.

Each option provides helpful insight, but professional fitting offers the most accurate results. To learn more about measuring from home, visit our How to Measure Ring Size guide, or schedule a personalized appointment to get fitted at a Brilliant Earth showroom near you.

How do I measure ring size using a ring size chart?

A ring size chart displays numerical sizes alongside their corresponding measurements in millimeters or inches. To determine your size, locate the row or column that matches your finger circumference.

For example, if your finger measures 54 mm, the closest match on the chart corresponds to approximately a US size 7. If your measurement falls between two sizes, it's generally best to size up for a more comfortable fit.

When reading a chart, pay attention to the measurement units (millimeters vs. inches) and the sizing system (US, UK, EU, etc.). Most charts are arranged in ascending order, making it easy to compare and identify your size.

Are ring sizes standard?

Ring sizes are not standardized globally. Different countries use their own systems, some based on numbers, others on letters or millimeters. For example, a US size 6 is approximately equivalent to a UK size L ½ or an EU size 52. Within the same region, however, ring sizes are generally consistent across brands.

Explore More Guides

Request a Free Ring Sizer How to Measure Ring Size Men's Ring Size Chart How to Know Ring Size Without Measuring How to Buy an Engagement Ring Engagement Ring Quiz Engagement Ring Trends Best Proposal Ideas

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