ISO 7810 ID-1

The ISO 7810 ID-1 business card size has dimensions of 85.6 mm x 54 mm, which converts to approximately 3.37 inches x 2.13 inches. With a surface area of 46.224 sq cm or 7.17 sq inches, it is similar to the standard ISO A8 size. Cards cut to ID-1 dimensions fit easily into a credit card sleeve or wallet.

This size is specified in the ISO/IEC 7810 standard for identification cards first published in 1985. The ID-1 format defines physical attributes of cards including dimensions, thickness, corner radii, etc. The 85.6 x 54 mm size matches that of most banking cards. This ensures compatibility with storage solutions designed for ISO 7810 ID-1 cards. As early plastic cards became popular in the 1980s, some adopted the ID-1 size for business cards to tap into existing manufacturing and wallet infrastructure. It remains an option today for business cards with the durability, texture, and slim fit of plastic cards. The ID-1 size is also considered an alternative international standard between ISO A8 and A7.