Sizing Guide

How to Measure
Ring Size at Home

Three simple at-home methods, an instant size calculator, and a complimentary first resize — so the fit is always perfect.

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Instant Conversion

Already have a measurement?

Enter your inner-circumference in millimeters and we'll match you to the closest US, UK, and EU sizes from our chart.

Circumference

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Your size will appear here

Three ways to measure

Pick the method that suits what you have on hand.

Make Your Own Ring Sizer

What you'll need

String, yarn, floss, or a thin strip of paper
Pen or marker
Ruler

Steps

01
Cut a piece of string, yarn, floss, or thin strip of paper to at least three inches long.
02
Wrap one end of the string around the base of the intended finger.
03
Using a pen or marker, mark where the end of the string overlaps with the rest.
04
Lay the string flat and use a ruler to measure the length between the end and your mark in millimeters.
05
Use the Ring Size Conversion Chart below to match the millimeter length to the corresponding ring size.

Conversion Chart

US Size	UK Size	EU Size	Circumference (mm)
3	F	44	44.2
3.5	G	45	45.5
4	H	46	46.8
4.5	I	47	48.0
5	J	48	49.3
5.5	K	50	50.6
6	L	51	51.9
6.5	M	52	53.1
7	N	54	54.4
7.5	O	55	55.7
8	P	56	57.0
8.5	Q	58	58.3
9	R	59	59.5
9.5	S	60	60.8
10	T	61	62.1
10.5	U	63	63.4
11	V	64	64.6
11.5	W	65	65.9
12	X	67	67.2

A note on fit — Sizes vary slightly between countries and manufacturers. For the most precise measurement we recommend a local jeweler. Quarter sizes can be requested for a perfect fit.

Frequently Asked

If you're planning a surprise, choosing a common size—or going a little larger—is usually the safest approach. Most women wear around a size 6, and most men around a size 9. You can also quietly check a ring they already wear or ask someone close to them who might know.

And not to worry — we offer free resizing for up to a year, so you'll always be able to perfect the fit after the moment has passed.