Blue Nile ring size guide

Blue Nile uses standard US ring sizing in quarter and half steps. Your US size is your Blue Nile size; the chart below adds UK, EU and millimetre equivalents.

I know my size in Value

Your size is US 7 (UK N½, EU 54).

Fit confidence Exact table match

Measurement confidence 70/100 · Medium Standard chart conversion; final fit still depends on band width and knuckle shape. Confirm with a printable or physical sizer before ordering an expensive ring.

US: 7
UK: N½
EU / ISO: 54
Japan: 14
CH / IT / ES: 14
Ø mm: 17.32
Circ mm: 54.4

Open US 7 size guide

Print Smart rings Wallet Physical sizer Local only; no account.

US	UK	EU	JP	CH	Ø mm	Circ mm
3	F½	44	4	4	14.07	44.2
3.5	G½	45	5	5	14.48	45.5
4	H½	47	7	7	14.88	46.8
4.5	I½	48	8	8	15.29	48.0
5	J½	49	9	9	15.70	49.3
5.5	K½	51	10	11	16.10	50.6
6	L½	52	12	12	16.51	51.9
6.5	M½	53	13	13	16.92	53.1
7	N½	54	14	14	17.32	54.4
7.5	O½	56	15	16	17.73	55.7
8	P½	57	16	17	18.14	57.0
8.5	Q½	58	17	18	18.54	58.3
9	R½	60	18	20	18.95	59.5
9.5	S½	61	19	21	19.35	60.8
10	T½	62	20	22	19.76	62.1
10.5	U½	63	22	23	20.17	63.4
11	V½	65	23	25	20.57	64.6
11.5	W½	66	24	26	20.98	65.9
12	Y	67	25	27	21.39	67.2
12.5	Z	68	26	28	21.79	68.5
13	Z½	70	27	30	22.20	69.7

How Blue Nile sizing works

Blue Nile offers US sizes (often in quarter sizes). Measure your US size and order it directly; they also provide free resizing on many styles.

Blue Nile ring size chart

Blue Nile (US)	UK	EU	Ø mm
3	F½	44	14.07
3.5	G½	45	14.48
4	H½	47	14.88
4.5	I½	48	15.29
5	J½	49	15.70
5.5	K½	51	16.10
6	L½	52	16.51
6.5	M½	53	16.92
7	N½	54	17.32
7.5	O½	56	17.73
8	P½	57	18.14
8.5	Q½	58	18.54
9	R½	60	18.95
9.5	S½	61	19.35
10	T½	62	19.76
10.5	U½	63	20.17
11	V½	65	20.57
11.5	W½	66	20.98
12	Y	67	21.39
12.5	Z	68	21.79
13	Z½	70	22.20

Frequently asked questions

Does Blue Nile use US ring sizes?

Yes. Blue Nile uses US sizing, often in quarter-size steps. A Blue Nile 7 is a US 7 (UK N½, EU 54).

What ring sizes does Blue Nile offer?

Standard US sizes, frequently in quarter increments, with free resizing available on many designs.

Ringsizely is an independent ring size converter and is not affiliated with, endorsed by, or sponsored by Blue Nile. Brand names are used for identification only. Always confirm with the retailer before ordering a non-resizable ring.