Oval Blue Sapphire Starburst Halo Diamond Engagement Ring

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Ring Size Guide

Find Your Ring Size

Measure the inside diameter of a ring that fits comfortable on your chosen finger, then match it to our size chart below.If you already know your international size, the chart will guide you seamlessly to the UK equivalent.

How to Measure Your Diameter

Inside Diameter	UK	EU	USA
13.2 mm	D	41 1/2	2
13.4 mm	D 1/2	42	2 1/4
13.6 mm	E	42 3/4	2 1/2
13.8 mm	E 1/2	43 1/2	2 3/4
14.0 mm	F	44 1/4	3
14.2 mm	F 1/2	45	3 1/4
14.4 mm	G	45 3/4	3 1/2
14.6 mm	G 1/2	46 1/2	3 3/4
14.8 mm	H	47 1/4	4
15.0 mm	H 1/2	48	4 1/4
15.2 mm	I	48 3/4	4 1/2
15.4 mm	J	49 1/2	4 3/4
15.6 mm	J 1/2	50	5
15.8 mm	K	50 3/4	5 1/4
16.0 mm	K 1/2	51 1/4	5 3/4
16.3 mm	L	52	6
16.5 mm	L 1/2	52 3/4	6 1/4
16.7 mm	M	53 1/2	6 1/2
16.9 mm	M 1/2	54	6 3/4
17.1 mm	N	54 1/2	7
17.3 mm	N 1/2	55 1/4	7 1/4
17.5 mm	O	56	7 1/2
17.7 mm	O 1/2	56 3/4	7 3/4
17.9 mm	P	57 1/2	8
18.1 mm	P 1/2	58	8 1/4
18.3 mm	Q	58 3/4	8 1/2
18.5 mm	Q 1/2	59 1/2	8 3/4
18.8 mm	R	60	9
19.0 mm	R 1/2	60 3/4	9 1/4
19.2 mm	S	61 1/2	9 1/2
19.4 mm	S 1/2	62 1/4	9 3/4
19.6 mm	T	63	10
19.8 mm	T 1/2	63 3/4	10 1/4
20.0 mm	U	64 1/2	10 1/2
20.2 mm	U 1/2	65	10 3/4
20.4 mm	V	65 3/4	11
20.6 mm	V 1/2	66 1/2	11 1/4
20.8 mm	W	67 1/4	11 1/2
21.0 mm	W 1/2	68	11 3/4
21.2 mm	X	68 3/4	12
21.4 mm	X 1/2	69 1/2	12 1/4
21.6 mm	Y	70	12 1/2
21.8 mm	Y 1/2	70 3/4	12 3/4
22.0 mm	Z	71 1/2	13
22.2 mm	Z+1	72	13 1/4
22.4 mm	Z+1/2	72 3/4	13 1/2
22.6 mm	Z+1 1/2	73	13 3/4
22.8 mm	Z+2	73 3/4	14
23.0 mm	Z+2 1/2	74	14 1/4
23.2 mm	Z+3	74 3/4	14 1/2
23.4 mm	Z+3 1/2	75	15

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HOW TO MEASURE YOUR DIAMETER

Diameter is the measurement across the inner width of the ring.

You’ll need:

A ring that fits you
Ruler

Step 1:

Find a ring that fits.

Step 2:

Lay a ring on top of ruler, and measure the widest area inside the ring from inner edge to inner edge. Round to the closest whole milimeter.

Step 3:

If your ring is a different shape and is not circular, measure teh shortest distance across.

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Oval Blue Sapphire Starburst Halo Diamond Engagement Ring

Oval Blue Sapphire Starburst Halo Diamond Engagement Ring

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