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Cartier Ring Size Chart

Cartier's size guide uses the standard EU/ISO sizing system — find your Cartier size in the EU column below, or convert it to US, UK, Germany, or Japan sizing.

Cartier uses the standard EU/ISO sizing system

No separate 'Cartier scale' exists — its published size guide is the same circumference-based EU system used across most of Europe.

Unlike some brands that publish a genuinely distinct proprietary scale (Gucci's Italian "IT" numbering, for example), Cartier's own size guide uses the EU/ISO system: the size number equals your finger's inner circumference in millimeters. That means the EU column in the table below already matches Cartier's own numbering exactly — no separate conversion is needed.

For example, a Cartier size 54 falls closest to our verified US size 7 row (EU 54.5), just above US 6.5 (EU 53). Always confirm your exact size with Cartier directly before ordering, since brand-specific fit and band width can shift the ideal size slightly.

Cartier (EU) size conversion chart

Match the EU column to your Cartier size, then read across for every equivalent.

Cartier (EU) ring size conversion chart
US / CanadaUS, CA, MXUK / AustraliaUK, IE, AU, NZ, ZAEUEU, FR, AT, BE, DK, SE, NO, FIGermany / NetherlandsDE, NLJapanJP, CN, KR, HK, SGIndia (Bluestone)India (Jewelove)India (VowJewels)India (The Vedic Crystals)Diameter (mm)Circumference (mm)
US / CanadaUS, CA, MX3UK / AustraliaUK, IE, AU, NZ, ZAFEUEU, FR, AT, BE, DK, SE, NO, FI44Germany / NetherlandsDE, NL14JapanJP, CN, KR, HK, SG4India (Bluestone)4.2India (Jewelove)4.2India (VowJewels)4India (The Vedic Crystals)5Diameter (mm)14.07Circumference (mm)44.2
US / CanadaUS, CA, MX3.5UK / AustraliaUK, IE, AU, NZ, ZAGEUEU, FR, AT, BE, DK, SE, NO, FI45.5Germany / NetherlandsDE, NL14.5JapanJP, CN, KR, HK, SG6India (Bluestone)5.49India (Jewelove)5.49India (VowJewels)5India (The Vedic Crystals)6Diameter (mm)14.48Circumference (mm)45.49
US / CanadaUS, CA, MX4UK / AustraliaUK, IE, AU, NZ, ZAHEUEU, FR, AT, BE, DK, SE, NO, FI47Germany / NetherlandsDE, NL15JapanJP, CN, KR, HK, SG7India (Bluestone)6.75India (Jewelove)6.75India (VowJewels)6India (The Vedic Crystals)7Diameter (mm)14.88Circumference (mm)46.75
US / CanadaUS, CA, MX4.5UK / AustraliaUK, IE, AU, NZ, ZAIEUEU, FR, AT, BE, DK, SE, NO, FI48Germany / NetherlandsDE, NL15.5JapanJP, CN, KR, HK, SG8India (Bluestone)8.03India (Jewelove)8.03India (VowJewels)7India (The Vedic Crystals)8Diameter (mm)15.29Circumference (mm)48.03
US / CanadaUS, CA, MX5UK / AustraliaUK, IE, AU, NZ, ZAJ½EUEU, FR, AT, BE, DK, SE, NO, FI49.5Germany / NetherlandsDE, NL15.5JapanJP, CN, KR, HK, SG9India (Bluestone)9.32India (Jewelove)9.32India (VowJewels)8India (The Vedic Crystals)9Diameter (mm)15.7Circumference (mm)49.32
US / CanadaUS, CA, MX5.5UK / AustraliaUK, IE, AU, NZ, ZAK½EUEU, FR, AT, BE, DK, SE, NO, FI50.5Germany / NetherlandsDE, NL16JapanJP, CN, KR, HK, SG10India (Bluestone)10.58India (Jewelove)10.58India (VowJewels)9India (The Vedic Crystals)10Diameter (mm)16.1Circumference (mm)50.58
US / CanadaUS, CA, MX6UK / AustraliaUK, IE, AU, NZ, ZAL½EUEU, FR, AT, BE, DK, SE, NO, FI52Germany / NetherlandsDE, NL16.5JapanJP, CN, KR, HK, SG11India (Bluestone)11.87India (Jewelove)11.87India (VowJewels)10India (The Vedic Crystals)11Diameter (mm)16.51Circumference (mm)51.87
US / CanadaUS, CA, MX6.5UK / AustraliaUK, IE, AU, NZ, ZAM½EUEU, FR, AT, BE, DK, SE, NO, FI53Germany / NetherlandsDE, NL17JapanJP, CN, KR, HK, SG13India (Bluestone)13.16India (Jewelove)13.16India (VowJewels)11India (The Vedic Crystals)12Diameter (mm)16.92Circumference (mm)53.16
US / CanadaUS, CA, MX7UK / AustraliaUK, IE, AU, NZ, ZAN½EUEU, FR, AT, BE, DK, SE, NO, FI54.5Germany / NetherlandsDE, NL17.5JapanJP, CN, KR, HK, SG14India (Bluestone)14.41India (Jewelove)14.41India (VowJewels)12India (The Vedic Crystals)13Diameter (mm)17.32Circumference (mm)54.41
US / CanadaUS, CA, MX7.5UK / AustraliaUK, IE, AU, NZ, ZAO½EUEU, FR, AT, BE, DK, SE, NO, FI55.5Germany / NetherlandsDE, NL17.5JapanJP, CN, KR, HK, SG15India (Bluestone)15.7India (Jewelove)15.7India (VowJewels)13India (The Vedic Crystals)14Diameter (mm)17.73Circumference (mm)55.7
US / CanadaUS, CA, MX8UK / AustraliaUK, IE, AU, NZ, ZAP½EUEU, FR, AT, BE, DK, SE, NO, FI57Germany / NetherlandsDE, NL18JapanJP, CN, KR, HK, SG16India (Bluestone)16.99India (Jewelove)16.99India (VowJewels)14India (The Vedic Crystals)15Diameter (mm)18.14Circumference (mm)56.99
US / CanadaUS, CA, MX8.5UK / AustraliaUK, IE, AU, NZ, ZAQ¼EUEU, FR, AT, BE, DK, SE, NO, FI58.5Germany / NetherlandsDE, NL18.5JapanJP, CN, KR, HK, SG17India (Bluestone)18.25India (Jewelove)18.25India (VowJewels)15India (The Vedic Crystals)16Diameter (mm)18.54Circumference (mm)58.25
US / CanadaUS, CA, MX9UK / AustraliaUK, IE, AU, NZ, ZAR½EUEU, FR, AT, BE, DK, SE, NO, FI59.5Germany / NetherlandsDE, NL19JapanJP, CN, KR, HK, SG18India (Bluestone)19.53India (Jewelove)19.53India (VowJewels)16India (The Vedic Crystals)17Diameter (mm)18.95Circumference (mm)59.53
US / CanadaUS, CA, MX9.5UK / AustraliaUK, IE, AU, NZ, ZAS½EUEU, FR, AT, BE, DK, SE, NO, FI61Germany / NetherlandsDE, NL19.5JapanJP, CN, KR, HK, SG19India (Bluestone)20.79India (Jewelove)20.79India (VowJewels)17India (The Vedic Crystals)18Diameter (mm)19.35Circumference (mm)60.79
US / CanadaUS, CA, MX10UK / AustraliaUK, IE, AU, NZ, ZAT½EUEU, FR, AT, BE, DK, SE, NO, FI62Germany / NetherlandsDE, NL20JapanJP, CN, KR, HK, SG20India (Bluestone)22.08India (Jewelove)22.08India (VowJewels)18India (The Vedic Crystals)19Diameter (mm)19.76Circumference (mm)62.08
US / CanadaUS, CA, MX10.5UK / AustraliaUK, IE, AU, NZ, ZAU½EUEU, FR, AT, BE, DK, SE, NO, FI63.5Germany / NetherlandsDE, NL20JapanJP, CN, KR, HK, SG22India (Bluestone)23.37India (Jewelove)23.37India (VowJewels)19India (The Vedic Crystals)20Diameter (mm)20.17Circumference (mm)63.37
US / CanadaUS, CA, MX11UK / AustraliaUK, IE, AU, NZ, ZAV½EUEU, FR, AT, BE, DK, SE, NO, FI64.5Germany / NetherlandsDE, NL20.5JapanJP, CN, KR, HK, SG23India (Bluestone)24.62India (Jewelove)24.62India (VowJewels)20India (The Vedic Crystals)21Diameter (mm)20.57Circumference (mm)64.62
US / CanadaUS, CA, MX11.5UK / AustraliaUK, IE, AU, NZ, ZAW½EUEU, FR, AT, BE, DK, SE, NO, FI66Germany / NetherlandsDE, NL21JapanJP, CN, KR, HK, SG24India (Bluestone)25.91India (Jewelove)25.91India (VowJewels)21India (The Vedic Crystals)22Diameter (mm)20.98Circumference (mm)65.91
US / CanadaUS, CA, MX12UK / AustraliaUK, IE, AU, NZ, ZAX½EUEU, FR, AT, BE, DK, SE, NO, FI67Germany / NetherlandsDE, NL21.5JapanJP, CN, KR, HK, SG25India (Bluestone)27.2India (Jewelove)27.2India (VowJewels)22India (The Vedic Crystals)23Diameter (mm)21.39Circumference (mm)67.2
US / CanadaUS, CA, MX12.5UK / AustraliaUK, IE, AU, NZ, ZAY½EUEU, FR, AT, BE, DK, SE, NO, FI68.5Germany / NetherlandsDE, NL22JapanJP, CN, KR, HK, SG26India (Bluestone)28.46India (Jewelove)28.46India (VowJewels)23India (The Vedic Crystals)24Diameter (mm)21.79Circumference (mm)68.46
US / CanadaUS, CA, MX13UK / AustraliaUK, IE, AU, NZ, ZAZ½EUEU, FR, AT, BE, DK, SE, NO, FI69.5Germany / NetherlandsDE, NL22JapanJP, CN, KR, HK, SG27India (Bluestone)29.74India (Jewelove)29.74India (VowJewels)24India (The Vedic Crystals)25Diameter (mm)22.2Circumference (mm)69.74

Don't know your Cartier size yet?

Measure your finger's circumference in millimeters, or enter a measurement from an existing ring, using our ring size calculator — it will show your EU (Cartier) size alongside every other system.

Frequently asked questions

What size is a Cartier size 54 ring in US size?

Cartier's size guide uses the standard EU/ISO sizing system (the size number equals the inner circumference in millimeters), the same system already verified in our chart's EU column. A Cartier size 54 falls between our US 6.5 (EU 53) and US 7 (EU 54.5) rows — closest to US size 7. Always confirm with Cartier directly before ordering, since brand-specific fit can vary slightly.

Does Cartier use its own proprietary sizing system?

No — unlike some brands (Gucci's Italian "IT" numbering, for example, which has no published mm equivalent), Cartier's published size guide uses the same EU/ISO circumference-based system used across most of Europe. That means the EU column in our full ring size chart already matches Cartier's numbering.

How do I find my Cartier ring size?

Measure your finger's circumference in millimeters (or use our ring size calculator), then match that value to the EU column in the chart below — that's the same size number Cartier uses on its own size guide.