OEC Round Cut Sapphire Halo Engagement Ring

Ring Size

Size Guide

MEASURE MY OWN RING

Instructions

Use a ring that fits the desired finger.
Measure the internal diameter of the ring (in mm). Ensure your ruler starts at the 0mm mark.

Use the size chart to determine your ring size.

Inside Diameter		Inside Circumference		British & Australian	US & Canada	French & Russian	German
MM	Inches	MM	Inches	Sizes
14.05	0.553	44.14	1.74	F	3	44	14
14.15	0.557	44.45	1.75	F 1/2	3 1/8	-	14
14.25	0.561	44.77	1.76	F 3/4	3 1/4	-	14
14.36	0.565	45.11	1.77	G	3 3/8	45 1/4	15
14.45	0.569	45.40	1.79	G 1/4	3 1/2	45 1/2	15
14.56	0.573	45.74	1.80	G 1/2	3 5/8	-	15
14.65	0.577	46.02	1.81	H	3 3/4	46	15
14.86	0.585	46.68	1.84	H 1/2	3 7/8	46 1/2	15
15.04	0.592	47.25	1.86	I	4	47 3/4	15.25
15.27	0.601	47.97	1.89	J	4 1/4	49	15.5
15.40	0.606	48.38	1.90	J 1/2	4 3/8	-	15.5
15.53	0.611	48.79	1.92	K	4 1/2	50	15.75
15.70	0.618	49.32	1.94	K 1/2	4 5/8	-	16
15.80	0.622	49.64	1.95	L	4 3/4	50 1/2	16
15.90	0.626	49.95	1.96	L 1/4	4 7/8	-	16.25
16.00	0.630	50.27	1.98	L 1/2	5	51	16.5
16.10	0.634	50.58	1.99	M	5 1/8	-	16.5
16.30	0.642	51.21	2.02	M 1/2	5 1/4	52	16.75
16.51	0.650	51.87	2.04	N	5 1/2	53	17
16.71	0.658	52.50	2.07	N 1/2	5 3/4	54	17.25
16.92	0.666	53.16	2.09	O	6	55	17.5
17.13	0.675	53.82	2.12	O 1/2	6 1/4	55 1/4	17.75
17.35	0.683	54.51	2.15	P	6 1/2	56	18
17.45	0.687	54.82	2.16	P 1/2	6 5/8	56 1/4	18.25
17.75	0.699	55.76	2.20	Q	6 3/4	57	18.5
17.97	0.707	56.45	2.22	Q 1/2	7	57 3/4	18.75
18.19	0.716	57.15	2.25	R	7 1/4	58	19
18.35	0.723	57.65	2.27	R 1/2	7 1/2	59	19
18.53	0.730	58.21	2.29	S	7 3/4	-	19
18.61	0.733	58.47	2.30	S 1/4	8	-	19
18.69	0.736	58.72	2.31	S 1/2	8 1/8	-	19
18.89	0.748	59.34	2.35	R 3/4	9	-	19

Instructions

Cut a thin strip of paper, ensure it’s not too wide.

2. 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.