Cartier Love ring size 58 to US

Cartier Love size 58 converted to US, UK and millimetres, with a rigid-band fit check and a converter preset to EU 58.

Exact answer

Cartier Love 58 is US 8.5

US: 8.5
UK: Q½
EU: 58
Diameter: 18.54 mm
Circumference: 58.3 mm

Size choice check

Compare the preset size with its closest neighbours before ordering a rigid, wide, or stacked ring.

Smaller EU 57 · US 8 18.14 mm Ø · 57.0 mm

Compare if the preset spins or feels loose.

Current EU 58 · US 8.5 18.54 mm Ø · 58.3 mm

Use this as the exact table conversion.

Larger EU 60 · US 9 18.95 mm Ø · 59.5 mm

Compare if the knuckle is tight, the band is wide, or rings will be stacked.

I know my size in Value

Your size is US 8.5 (UK Q½, EU 58).

Fit confidence Exact table match

Fit confidence 76/100 · Medium EU/ISO size is based on inner circumference in millimetres. Confirm the fit style with the brand, especially for wide or rigid bands.

18.54 mm Circ mm 58.3 mm

US: 8.5
UK: Q½
EU / ISO: 58
Japan: 17
CH / IT / ES: 18
Inner diameter, millimetres: 18.54
Circ mm: 58.3

Why this size?

Your input maps to US 8.5 — UK Q½, EU 58, JP 17, Ø 18.54 mm.

Inner diameter is exact to about ±0.1 mm. String or on-screen methods add roughly ½–1 size of noise, so confirm with a second method before buying an expensive or non-resizable ring.

Open US 8.5 size guide

More options

Print Smart rings Brand guides Wallet Screen sizer Between sizes Wide-band fit

Local only; no account.

Ring fit fix advisor

Choose the fit problem and get the safest next step before resizing, replacing or buying another ring.

Wide band or comfort-fit Non-resizable or brand ring Smart-ring fit issue Too loose or spinning

Converter chart
US	UK	EU	JP	CH	Inner diameter, millimetres	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 this brand sizing works

Cartier sizing starts from finger circumference in millimetres. The number 58 corresponds to a 58 mm inner circumference on the ISO/EU scale.

The Love ring is rigid, so do not rely on a loose thin-band fit alone. If EU 58 is tight over the knuckle or your finger changes through the day, compare EU 57/60 before ordering.

Nearby sizes

Nearby sizes
Cartier EU	US	UK	Inner diameter, millimetres	Circumference mm
56	7.5	O½	17.73	55.7
57	8	P½	18.14	57.0
58	8.5	Q½	18.54	58.3
60	9	R½	18.95	59.5

What to do next

Frequently asked questions

What is Cartier Love size 58 in US?

Cartier Love size 58 converts to US 8½, UK Q½, and about 18.54 mm inner diameter.

Should I choose Cartier Love 58 if I am between sizes?

If the ring feels tight at the knuckle or you are between sizes, compare the larger size and confirm with Cartier before ordering.

Source checked 2026-06-24. Ringsizely is independent and is not affiliated with, endorsed by, or sponsored by Cartier. Brand and collection names are used for identification only.