Brilliant Earth

Request a Free Ring Sizer

We are happy to send you a complimentary plastic ring sizer so that you can easily measure your ring size at home. Plastic ring sizers shipped to the US and Canada will arrive within five to seven business days and delivery time to the UK and Australia may take longer.

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International Ring Size Chart

All Brilliant Earth rings are specified in standard US sizes. View the conversion chart to see how US sizes map to finger circumference, as well as how US sizes convert to Canada, Australia, New Zealand, UK, Ireland, Japan, France, and Germany ring sizes

View Ring Size Chart

Inside Circumference		US & Canada	Australia, New Zealand, UK & Ireland	France	Germany	Japan
IN	MM	US & Canada	Australia, New Zealand, UK & Ireland	France	Germany	Japan
1.74	44.2	3	F	44	14	4
1.77	44.8	3.25	F-½	44.625	14.25	---
1.79	45.5	3.5	G	45.25	14.5	5
1.82	46.1	3.75	G-½	45.875	14.75	6
1.84	46.8	4	H-½	46.5	15	7
1.87	47.4	4.25	I	47.125	15.25	---
1.89	48	4.5	I-½	47.75	15.5	8
1.92	48.7	4.75	J	48.375	---	---
1.94	49.3	5	J-½	49	15.75	9
1.97	50	5.25	K	49.625	16	---
1.99	50.6	5.5	K-½	50.25	16.25	10
2.02	51.2	5.75	L	50.875	---	11
2.04	51.9	6	L-½	51.5	16.5	12
2.07	52.5	6.25	M	52.125	16.75	---
2.09	53.1	6.5	M-½	52.75	17	13
2.12	53.8	6.75	N	53.375	---	---
2.14	54.4	7	O	54	17.25	14
2.17	55.1	7.25	O-½	54.625	17.5	---
2.19	55.7	7.5	P	55.25	17.75	15
2.22	56.3	7.75	P-½	55.875	---	---
2.24	57	8	Q	56.5	18	16
2.27	57.6	8.25	Q-½	57.125	18.25	---
2.29	58.3	8.5	Q-½	57.75	18.5	17
2.32	58.9	8.75	R	58.375	18.75	---
2.34	59.5	9	R-½	59	19	18
2.37	60.2	9.25	S	59.625	19.25	---
2.39	60.8	9.5	S-½	60.25	19.5	19
2.42	61.4	9.75	T	60.875	19.75	---
2.44	62.1	10	T-½	61.5	20	20
2.47	62.7	10.25	U	62.125	20.25	21
2.49	63.4	10.5	U-½	62.75	20.5	22
2.52	64	10.75	V	63.375	---	---
2.54	64.6	11	V-½	64	20.75	23
2.57	65.3	11.25	W	64.625	---	---
2.59	65.9	11.5	W-½	65.25	21	24
2.62	66.6	11.75	X	65.875	---	---
2.65	67.2	12	Y	66.5	21.25	25
2.67	67.8	12.25	Y-½	67.125	21.5	---
2.7	68.5	12.5	Z	67.75	21.75	26
2.72	69.1	12.75	Z-½	68.375	---	---
2.75	69.7	13	---	69	22	27

*Swipe to view more ring sizes*

Ring Sizing Guide

If you would like to determine your ring size immediately, we suggest that you print our simple Ring Sizing Guide and read the instructions carefully. Before you print, be sure to check that page scaling is set to "none" on your print dialog box. Our ring sizing guide will help you find a men's ring size or a women's ring size.

View Guide

How to Find Her Ring Size

If you are aiming for a surprise, read our tips about how to find your partner's ring size without her knowing.
One tried-and-true method is asking a parent or close friend if they know her finger size.
Borrow one of your partner's rings and use the Ring Sizing Guide above to determine its size. The ring should be from the correct finger on the correct hand.
Knowing the most common ring size can help you make your choice. The average ring size for women is 6 to 6.5, and the average ring size for men is 9 to 10. When no other information is available to you, selecting one of these standard ring sizes is your best choice.

Helpful Hints

Our dominant hands are generally slightly larger - make sure you measure for her left!
Rings with wider bands will fit a bit tighter. If you plan to measure one of her rings, try to measure one with a similar width as the ring you want to purchase.
If it comes down to guessing, err on the large side. You want the ring to be able to slip onto her finger when you're proposing!

Reina Diamond Engagement Ring in Brilliant Earth ring box

Free 60 Day Resize Policy

Brilliant Earth is happy to offer a complimentary 60 day resize period for all US, Canadian, UK, and Australian customers when within the jeweler's recommended sizing range. If your ring doesn't fit perfectly, Brilliant Earth offers complimentary shipping both ways while we resize your ring.

learn more

Find Your Ring Size

Request a Free Ring Sizer

International Ring Size Chart

Ring Sizing Guide

How to Find Her Ring Size

Helpful Hints

Free 60 Day Resize Policy

Ready to get started?

Engagement
Rings

wedding
Rings

vintage
Rings

Find Your Ring Size

Request a Free Ring Sizer

International Ring Size Chart

Ring Sizing Guide

How to Find Her Ring Size

Helpful Hints

Free 60 Day Resize Policy

Ready to get started?

EngagementRings

weddingRings

vintageRings

Engagement
Rings

wedding
Rings

vintage
Rings