Question 1

How do I find my Cartier ring size?

Accepted Answer

You can use our free online ring sizer tool to measure your finger. Once you have your circumference in millimeters, use the conversion chart above to find your Cartier size. Alternatively, visit a Cartier store for professional sizing.

Question 2

What size system does Cartier use?

Accepted Answer

Cartier uses the French sizing system, which measures rings by their inner circumference in millimeters. Cartier ring sizes typically range from 45 to 65, offering a wide selection for all finger sizes.

Question 3

How do I convert Cartier size to US size?

Accepted Answer

Use the conversion table above to find the equivalent US size for your Cartier ring size. For example, Cartier sizes are based on french (fr) - uses inner circumference with french numbering. Enter your Cartier size in the converter and it will show you the equivalent US, UK, and EU sizes.

Question 4

Can I resize a Cartier ring?

Accepted Answer

Many Cartier rings can be resized, but it depends on the design and materials. We recommend contacting Cartier directly or visiting an authorized retailer for resizing options. Some intricate designs may not be suitable for resizing.

Question 5

What if I'm between Cartier sizes?

Accepted Answer

If you're between sizes, we typically recommend going with the larger size for comfort. However, consider the ring style - wider bands tend to fit tighter, so sizing up may be advisable. For engagement or wedding rings, professional sizing is strongly recommended.

Cartier Size	US	UK/AU	EU	Circumference	Diameter
45	4.5	H	46	45.0 mm	14.48 mm
47	5	I	47	47.0 mm	14.88 mm
49	5.5	J	48	49.0 mm	15.09 mm
51	6	L	51.5	51.0 mm	16.51 mm
53	6.5	L½	52	53.0 mm	16.71 mm
55	7.5	O	55	55.0 mm	17.53 mm
57	8	P	57	57.0 mm	18.14 mm
59	9	R	59	59.0 mm	18.75 mm
61	10	T	62	61.0 mm	19.56 mm
63	11	U	64	63.0 mm	20.17 mm
65	12	W	66	65.0 mm	20.78 mm

Convert Cartier Ring Sizes to US/UK/EU

Cartier Ring Size Chart

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