What is the standard ISO 7810 size of a bank card, measured in millimetres?

The standard ISO 7810 bank-card size is 85.60 × 53.98 millimetres. This ID-1 format is used for most payment cards, including credit cards, debit cards, and many identification cards.

The dimensions are part of an international physical-card standard rather than a rule created by an individual bank or card network. Standard sizing lets cards fit consistently into wallets, readers, automated teller machines, and point-of-sale terminals worldwide.

The measurement describes the card’s length and width, not its thickness. ISO 7810 also defines other card formats, but ID-1 is the familiar full-size format. A card can have rounded corners, embossed numbers, a magnetic stripe, or an electronic chip while retaining the same basic footprint.