ISO/IEC 7810

ISO/IEC 7810 "Identification cards — Physical characteristics" is an international standard that defines the physical characteristics for identification cards.
The characteristics specified include:
The standard includes test methods for resistance to heat.
Card sizes.
The standard defines four card sizes: ID-1, ID-2, ID-3 and ID-000.
All card sizes have a thickness of .
The standard defines both metric and imperial measurements, noting that:
ID-1.
The ID-1 format specifies a size of and rounded corners with a radius of 2.88–3.48 mm (about  in). It is commonly used for payment cards (ATM cards, credit cards, debit cards, etc.). Today it is also used for driving licences and personal identity cards in many countries, automated fare collection system cards for public transport, in retail loyalty cards, and even crew member certificates (particularly for aircrew).
ID-2.
The ID-2 format specifies a size of . This size is the A7 format. The ID-2 format is used, for example, for visas. It is used for the French and Romanian identity card, and was also used by the German identity card issued until October 2010. Since November 2010, German ID cards are issued in the ID-1 format more widely used in Europe for national ID cards. It was previously also used for Finnish and Swedish drivers' licences before those changed to the ID-1 format.
ID-3.
ID-3 specifies a size of . This size is the B7 format. This format is commonly used for passport booklets.
ID-000.
ID-000 specifies a size of , with one corner slightly () bevelled. The ID-000 size was first defined by ENV 1375–1, "Identification card systems — Intersector integrated circuit(s) card additional formats — Part 1: ID-000 card size and physical characteristics."
This size is used for the "mini-SIM" format of subscriber identity modules.
ID-000 size card as part of ID-1 size card.
An "informative" (i.e. non-mandatory) annex describes how an ID-000 sized card may be included in an ID-1 size card for processing (e.g. in an ID-1 reader), but with "relief areas around the perimeter of the ID-000 size card to allow it to be removed from the ID-1 size card without punching tools". An ID-1 size card containing an ID-000 size card is denoted as "ID-1/000".
Card characteristics.
The standard specifies requirements for such physical characteristics as: