Ring Size Guide Millimeters

Measurement Instructions

Alternative A
1. Select a ring that you are happy with, use it as a reference, lay it flat.
2. Measure the inner ring diameter using a millimetre ruler.
3. Choose the ring size closest to your measurement, see inner diameter millimetre (mm) measurements in the chart below.

Alternative B
1. Wrap a piece of string or dental floss around the thickest part (often the knuckle) on your chosen finger, do not pull tight.
2. Use a pen to mark a point on the string where the string end meet the string.
3. Measure the string/dental floss length from the end to your marking using a millimetre ruler, this is your finger circumference.
4. Choose the ring size closest to your measurements, see the circumference millimetre (mm) measurements in the chart below.

Teeny-Tiny
Please note that our rings are measured in millimetres (mm) and that is small. A hair strand is for example often between 0.04 to 0.08mm. So if your ring size for example is 17.75mm and we only have 18mm, the difference between these 2 sizes are minimal, the larger ring will still fit.

Between Sizes
If you are between 2 sizes we strongly recommend you to choose the larger size because the size of your fingers will often change throughout the day. Your fingers may swell if you are warm, in regards to how much fluid you have in your body, if you are working with your hands and so on

Measurement Chart

International Conversion Table

Our Ring Sizes	US Ring Sizes	UK Ring Sizes	Diameter mm	Circumference mm
3	3	F 1/2	14 mm	44 mm
3.5	3.5	G 1/2	14.5 mm	45.5 mm
4	4	H 1/2	14.9 mm	47 mm
4.5	4.5	I 1/2	15.3 mm	48 mm
5	5	J 1/2	15.6 mm	49 mm
5.5	5.5	K 1/2	16 mm	51 mm
6	6	L 1/2	16.5 mm	52 mm
6.5	6.5	M 1/2	16.9 mm	53 mm
7	7	N 1/2	17.2 mm	54 mm
7.5	7.5	O 1/2	17.7 mm	55.5 mm
8	8	P 1/2	18.2 mm	57 mm
8.5	8.5	Q 1/2	18.5 mm	58 mm
9	9	R 1/2	19 mm	59.5 mm
9.5	9.5	S 1/2	19.4 mm	61 mm
10	10	T 1/2	19.8 mm	62 mm
10.5	10.5	U 1/2	20 mm	63 mm
11	11	V 1/2	20.6 mm	64.5 mm
11.5	11.5	W 1/2	21 mm	66 mm
12	12	X 1/2	21.3 mm	67 mm
12.5	12.5	Z	21.6 mm	68 mm
13	13	Z 1/2	22.3 mm	70 mm
13.5	13.5	Z +	22.6 mm	71 mm