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Credit card size in cm

A credit or bank card is exactly 8.56 × 5.4 cm (85.60 × 53.98 mm, or 3.37 × 2.13 inches). This is a strict global standard — every card, from every bank and country, is this exact size.

8.56 cmwidth
5.4 cmheight
0.76 mmthickness

Card size in any unit

The card is fixed at 85.60 × 53.98 mm. Switch units to see it however you need.

The exact standard

Measuremmcminches
Width85.60 mm8.56 cm3.370 in
Height53.98 mm5.40 cm2.125 in
Thickness0.76 mm0.076 cm0.030 in
This is ISO/IEC 7810 ID-1 — the same standard used for driver's licences, ID cards and most gift cards, which is why they all fit the same wallet slot regardless of issuer or country.

How a credit card compares to other everyday objects

ObjectSize
Credit / bank card8.56 × 5.4 cm
US business card8.89 × 5.08 cm
UK/EU business card8.5 × 5.5 cm
UK/EU passport photo3.5 × 4.5 cm
A7 paper7.4 × 10.5 cm

Using a card to measure something else

Because the size is fixed worldwide, a credit card is a reliable improvised ruler. The long edge is 8.56 cm, the short edge 5.4 cm, and the diagonal is exactly 10.16 cm (4 inches). Stack ten cards and you have 7.6 mm — a quick way to gauge small thicknesses.

This is why product photos so often include a card for scale: unlike a coin or a hand, it means the same thing to a viewer in any country. If you are checking whether something fits a wallet slot, remember the card also needs clearance — slots are typically cut a millimetre or two wider than 8.56 cm.

Why it's useful as a size reference

Because it's an exact, universal standard, a credit card is a handy real-world object to compare other sizes against — it's why product photos often include one next to small items.

More common object sizes: credit card · business card · standard door · passport photo · phone screen · all sizes

Frequently asked questions

What is the exact size of a credit card?

85.60 × 53.98 mm (8.56 × 5.4 cm, or 3.37 × 2.13 inches) — an ISO/IEC 7810 standard.

Are all credit cards the same size?

Yes — virtually all bank cards, credit cards and ID cards worldwide follow the same ISO/IEC 7810 ID-1 standard.

How thick is a credit card?

About 0.76 mm.

How many cm is a credit card?

A credit card is 8.56 cm wide and 5.4 cm tall (85.60 × 53.98 mm).

How wide is a credit card?

8.56 cm, or 85.60 mm — 3.37 inches.

How long is a credit card in cm?

The long edge is 8.56 cm; the short edge is 5.4 cm.

What size is a credit card in cm?

8.56 × 5.4 cm. This is set by ISO/IEC 7810 ID-1 and is the same worldwide.