Find Your Ring Size

Dia Centre is happy to assist you in determining the correct ring size. You can also learn how to find your ring size using our ring size guide. If your ring size is not listed for the ring you choose, please call us at 212-354-0393 for assistance.

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.

International Ring Size Chart

All Dia Centre 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

Inside Circumference		US & Canada	Australia, New Zealand, UK & Ireland	France	Germany	Japan
IN	MM
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.

Ring Size Measurement by Ring’s Circumference

The circumference of a ring can be measured by its length around the inner circle. You can use below given finger size strip for measuring your exact ring size. Please follow the steps to get the accurate ring size: Take a printout of the below given figure B as per the given print instructions. Carefully cut this printout from the image outline to get a size strip. Also give a slit inside the strip at the left end. Wrap this size strip around the intended finger with the scale facing out and then slide the narrow end of the strip through the slit. Pull the narrow end until the fit is snug. Also try to move that fit through the largest part of the finger, this may be the knuckle. The number that lines up at the slit represents the ring size for that finger.

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

Types of Necklaces Based on Length

Necklaces traditionally come in six lengths. Depending on the length, the necklace will hang to a different part of the wearer's body.

Necklace Length Comparison Chart

You can use below given necklace length comparison chart which illustrates where necklaces / chains of different lengths will hang on a person with an average neck size.