Unicraftale 21Pcs 7 Size 304 Stainless Steel Plain Band Rings Set, Rainbow Color, Inner Diameter: 16.3~21.3mm, 3Pcs/size

How to Measure Your Ring Size

Please note ring sizes may differ in different designs. Rings with wider bands will fit a bit tighter. So you can go up a size when purchasing a wide design ring. In addition, make sure that your finger is at its normal size before taking your measurements.

Method 1: Using a piece of paper strip or thread.

First, take out a piece of the paper strip, string, ribbon, or thread, and wrap it around where you wear your rings.

Second, when the paper strip starts to overlap, make the mark with a pen or pencil.

Third, measure the length you have marked with a measuring tape or ruler. Thus, you’ll get the inside circumference of rings and then place the measured size on the chart below to find your suitable ring size.

International Ring size Conversion

Inside Diameter		Inside Circumference		Sizes
inch	mm	inch	mm（ISO /Europe）	US, Canada, Mexico	UK, Ireland, Australia, South Africa, New Zealand	China, Japan, South Korea, South America	India	Italy, Spain, Netherlands, Switzerland
0.554	14.07	1.74	44.2	3	F	4		4.2
0.57	14.48	1.79	45.5	3 1⁄2	G			5.5
0.586	14.88	1.84	46.8	4	H	7		6.8
0.602	15.29	1.89	48	4 1⁄2	I	8	8	8
0.618	15.7	1.94	49.3	5	J 1⁄2	9		9.3
0.634	16.1	1.99	50.6	5 1⁄2	K 1⁄2	10		10.6
0.65	16.51	2.04	51.9	6	L 1⁄2	11	12	11.9
0.666	16.92	2.09	53.1	6 1⁄2	M 1⁄2	13	13	13.1
0.682	17.32	2.14	54.4	7	N 1⁄2	14	14	14.4
0.698	17.73	2.19	55.7	7 1⁄2	O 1⁄2	15		15.7
0.714	18.14	2.24	57	8	P 1⁄2	16	17	17
0.722	18.34	2.27	57.6	8 1⁄4	P 3⁄4			17.6
0.738	18.75	2.32	58.9	8 3⁄4	R		19	18.9
0.754	19.15	2.37	60.2	9 1⁄4	S		20	20.2
0.77	19.56	2.42	61.4	9 3⁄4	T			21.4
0.786	19.96	2.47	62.7	10 1⁄4	U	21	23	22.7
0.802	20.37	2.52	64	10 3⁄4	V		24	24
0.818	20.78	2.57	65.3	11 1⁄4	W			25.3
0.834	21.18	2.62	66.6	11 3⁄4	X			26.6
0.85	21.59	2.67	67.8	12 1⁄4	Y		28	27.8
0.866	22	2.72	69.1	12 3⁄4	Z		29	29.1
82	22.4	2.77	70.4	13 1⁄4	Z1			30.4
0.898	22.81	2.82	71.7	13 3⁄4	Z2		32	31.7
0.914	23.22	2.87	72.9	14 1⁄4			33	32.9
0.922	23.42	2.9	73.6	14 1⁄2	Z4			33.6
0.938	23.83	2.95	74.8	15			35	34.8

Method 2: Measuring a ring that fixes your finger well.

Take out a ring that fixes you well and measure the inside diameter of it.
Then place the measured size to the measurement-conversion chart above to determine your ring size.

Method 3: Using professional ring measuring tools

With the help of professional ring sizer tools, you can get the accurate ring size in just one step with no conversion.

1:Gauge finger measuring belt:

How to Use

Just put it as a ring on your finger and adjust it until it is snug but removable. Then read your accurate finger size directly from the measuring belt.

Tips: TOOL-P005-01(Europe), TOOL-P005-02(US), TOOL-P005-03(Japan), TOOL-P005-04(Korea), TOOL-P005-06(UK).

2:Ring sizer models & ring sizer mandrel:

How to Use

First, use these rings models to test the size of your finger.

Second, after finding a ring that fits you well, measure the inside diameter of it with a ruler or you can use a professional ring sizer mandrel to measure the ring size directly with no need for conversion.

Tips: There are many other ring measuring tools available on our website, you can search "Ring Sizer" for more choices.