Standard credit card size
The standard credit card size is 85.60 × 53.98 mm (3.37 × 2.13 inches). It is fixed by ISO/IEC 7810 ID-1 and has not changed in decades — deliberately.
ID-1ISO format
85.60 × 53.98 mmthe standard
Worldwidewhere it applies
What the standard covers
| Property | Specification |
|---|---|
| Width | 85.60 mm |
| Height | 53.98 mm |
| Thickness | 0.76 mm |
| Corner radius | 3.18 mm |
| Tolerance | approx. ±0.13 mm |
The ISO 7810 card family
| Format | Size | Used for |
|---|---|---|
| ID-1 | 85.60 × 53.98 mm | Payment cards, ID, driving licences |
| ID-2 | 105 × 74 mm | Some national ID documents |
| ID-3 | 125 × 88 mm | Passports |
| ID-000 | 25 × 15 mm | SIM cards |
Why it never changes
Millions of ATMs, payment terminals, wallets and card printers are built around ID-1. Changing the size by even a millimetre would strand that hardware overnight. So while the technology on the card has moved from embossing to magnetic stripe to chip to contactless, the outline has stayed exactly the same.
"Standard" here means genuinely standard — not a common convention that varies by country, the way business cards or door sizes do. A card from any bank in any country is the same size. That reliability is why a credit card is such a useful everyday object to measure other things against.
Frequently asked questions
What is the standard size of a credit card?
85.60 × 53.98 mm (3.37 × 2.13 inches), defined by ISO/IEC 7810 ID-1.
Is credit card size the same in every country?
Yes. ID-1 is an international standard, so cards issued anywhere share the same dimensions.
What is ID-1?
ID-1 is the ISO/IEC 7810 format used for payment cards, ID cards and driving licences: 85.60 × 53.98 mm.