Catbird ring size guide

Catbird uses standard US ring sizing, including many delicate and stacking styles. Your US size is your Catbird size; see UK and EU equivalents below.

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 Catbird sizing works

Catbird rings are sized in US numbers. Their thin “threadbare” bands can run slightly small — when in doubt, size up a quarter size.

Catbird ring size chart

Catbird (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 Catbird use US ring sizes?

Yes. Catbird uses US sizing. For their very thin bands, consider sizing up a quarter size.

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