ISO 7810
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International Standard ISO 7810 defines three formats for identity cards or identification cards, ID-1, ID-2, and ID-3.
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ID-1
The ID-1 format specifies a size of 85.60 × 53.98 mm, equal to 3.370 × 2.125 in. It is commonly used for banking cards (ATM cards, credit cards, debit cards, etc.). It is today also used for driving licences in many countries (e.g., US, EU), retail loyalty cards, and it is one fairly common format for business cards.
ISO 7813 defines additional characteristics of ID-1 plastic banking cards, for example a thickness of 0.76 mm and corners rounded with a radius of 3.18 mm.
ISO 7811 defines traditional techniques for recording data on ID-1 identification cards, namely embossed characters and several different magnetic recording formats.
ISO 7816 defines ID-1 identification cards with an embedded chip (smartcard) and contact surfaces for power, clock, reset and serial-data signals.
ISO 14443 defines identification cards with an embedded chip (proximity card) and a magnetic loop antenna that operates at 13.56 MHz (RFID). More recent ICAO standards for machine-readable travel documents specify a cryptographically signed file format and authentication protocol for storing biometric features (photos of face, fingerprint and/or iris) in ISO 14443 RFID chips.
ID-2
The ID-2 format specifies a size of 105 × 74 mm, equal to 4.134 × 2.913 in. This size is the A7 format. The ID-2 format is used, for example, by the German Personalausweis (Identity document). This slightly larger format provides enough space for a clearly recognizeable facial photo, but is still small enough to be carried in a wallet.
ID-3
ID-3 specifies a size of 125 × 88 mm, equal to 4.921 × 3.465 in. This size is the B7 format. The ID-3 format is used worldwide for passports and visas.
ICAO Document 9303 defines the format of machine-readable travel documents, the optical-character-recognition lines found on the bottom of most passports and visas.
See also: Magnetic stripe card