At Coral Covey we use the UK Standard of ring sizing (where each size is represented by a letter, e.g. ‘M’). To order from us, you will need to know your ring size according to the UK Standard sizing. On the page below we offer a conversion table if you know your ring size based on another standard.

Otherwise, there are two relatively simple methods of determining your size. Simply print out our ‘Ring Size Chart’ and follow our instructions below. Please note: it is important that this document is printed at 100% scale so that the physical sizing is correct.

Click here for your printable guide.

Method 1: Measurement of your finger

Use the printed document we have created to measure your finger. Here are some important things to note before measuring:

• Measure your finger at the end of the day.
• Do not measure your finger when it is hot or cold; this can affect your finger’s size.
• Measure between the knuckle and the first joint of the finger (where the ring will sit).
• Measure the finger from the hand which you will use your ring; left and right hands can differ slightly in size.
• Make sure that the chosen size leaves enough room for the ring to pass easily along the entire length of the finger.
• If your measured finger size falls between two sizes, choose the larger size.
• The ring size/geometry can affect the choice of size: wide-band rings can be worn more loosely than a narrower rings.

Method 2: Measurement of an existing ring

Use the printed document as a reference template to measure an existing ring. Here are some important things to note when measuring an existing ring size:

• Align the inside edge of the existing ring with the circle on the chart which most closely matches the ring size. The less printed circle that is visible around the inside of the ring, the better.
• Be mindful of big variations in geometry between the ring being measured and the ring you intend to order. Very wide-band rings are often designed for a slightly looser fit. If possible, use an existing ring that closely matches the overall geometry/style of the ring to be ordered.

Sizing conversion chart

If you have an existing ring size that requires conversion to the UK Standard, then please refer to this chart:

UK Size	European Size (Approx.)	American Size (Approx.)		Inside Diameter
				Inches	mm
G				0.5680	14.427
G½				0.5758	14.625
	46			0.5765	14.642
		4		0.5820	14.783
H				0.5835	14.821
	47			0.5890	14.961
H½				0.5913	15.019
		4½		0.5980	15.189
I				0.5990	15.215
	48			0.6015	15.279
I½				0.6068	15.413
	49	5		0.6141	15.597
J				0.6145	15.608
J½				0.6223	15.806
	50			0.6266	15.916
K		5½		0.6300	16.002
K½				0.6378	16.200
	51			0.6391	16.234
L		6		0.6455	16.396
	52			0.6517	16.552
L½				0.6533	16.594
M				0.6610	16.789
		6½		0.6620	16.815
	53			0.6642	16.871
M½				0.6688	16.988
N				0.6765	17.183
	54			0.6767	17.189
		7		0.6780	17.221
N½				0.6843	17.381
	55			0.6893	17.507
O				0.6920	17.577
		7½		0.6940	17.628
O½				0.6998	17.775
	56			0.7018	17.826
P				0.7075	17.971
		8		0.7100	18.034
	57			0.7143	18.144
P½				0.7153	18.169
Q				0.7230	18.364
		8½		0.7265	18.453
	58			0.7269	18.462
Q½				0.7308	18.562
R				0.7385	18.758
	59			0.7394	18.780
		9		0.7430	18.872
R½				0.7463	18.956
	60			0.7519	19.098
S				0.7540	19.152
		9½		0.7590	19.279
S½				0.7618	19.350
	61			0.7644	19.416
T				0.7695	19.545
	62			0.7770	19.736
T½				0.7772	19.741
		10		0.7780	19.761
U				0.7850	19.939
	63			0.7895	20.054
U½				0.7928	20.137
		10½		0.7940	20.168
V				0.8005	20.333
	64			0.8020	20.372
V½				0.8083	20.531
		11		0.8110	20.599
	65			0.8146	20.690
W				0.8160	20.726
W½				0.8238	20.925
	66	11½		0.8271	21.008
X				0.8315	21.120
X½				0.8393	21.318
	67			0.8396	21.326
		12		0.8430	21.412
Y				0.8470	21.514
	68			0.8522	21.645
Y½				0.8548	21.712
		12½		0.8590	21.819
Z				0.8625	21.908
	69			0.8647	21.963
Z½				0.8703	22.106
		13		0.8750	22.225