Ring Sizer

Select an existing ring that fits the desired finger. Measure the internal diameter of the ring (in mm). Use the below chart to determine your ring size.

Measure Your Finger

Wrap a strip of paper around your finger where you’d like your ring to be.
Make sure that the paper is pulled snug to your finger, the tighter the better, to find your best fit.
Mark the spot where the paper meets and measure the distance with a ruler (mm).
Use the below chart to determine your ring size.

Internal Diameter (mm)	US/CAN	UK/AUS	German
14.1 mm	3	F	14
14.5 mm	3.5	G	14.5
14.9 mm	4	H 1/2	15
15.3 mm	4.5	I 1/2	15.25
15.7 mm	5	J 1/2	15 3/4
16.1 mm	5.5	K 1/2	16
16.5 mm	6	L 1/2	16 1/2
16.9 mm	6.5	M 1/2	16.75
17.3 mm	7	O	17 1/4
17.7 mm	7.5	P	17.75
18.1 mm	8	Q	18
18.5 mm	8.5	R	18.5
19 mm	9	S	19
19.4 mm	9.5	T	19.5
19.8 mm	10	U	19 3/4
20.2 mm	10.5	V	20.25
20.6 mm	11	W	20 1/2
21.0 mm	11.5	X	21
21.4 mm	12	Y	21 1/2
21.8 mm	12.5	Z	22
22.2 mm	13	Z 1	22.25

When is the best time to measure my finger size?

It is best to measure your finger at the end of the day when it is at its largest. This helps to ensure a comfortable fit throughout the day.

Can cold weather affect my ring size?

Yes! Cold weather can shrink your fingers by up to half a size, so it's important to measure when your hands are warm.

Should I avoid measuring my finger after eating or drinking?

Yes, alcohol and salty foods can cause your fingers to swell, so it’s best to avoid measuring after consuming cocktails or salty snacks.

What if my ring size falls between two sizes?

If your measurement is between two sizes, it's usually recommended to choose the larger size for a more comfortable fit.

How tight should my ring fit?

Your ring should fit snugly but comfortably. It should slide on easily, but you should feel a bit of resistance when taking it off over your knuckle.

What’s the easiest way to measure my ring size at home?

You can either use a ring you already own and measure its internal diameter, or wrap a strip of paper around your finger, mark the meeting point, and compare it to a ring size chart.