ISO/IEC 7810, ID-1 Credit Card/ID Card Blank Platform (STEP and STL)

thingiverse

International Standard ID Card. Size ID-1 as defined here: https://en.wikipedia.org/wiki/ISO/IEC_7810#ID-1 85.6 mm wide x 53.98 mm long and 0.76 mm thick. The Wikipedia page above gives a range of radii for the corners between 2.88 mm to 3.48 mm. I went with 3.18 mm based on this post: http://www.alfoart.com/new-credit-card-1.html, and that dimension seems to match up with the cards in my wallet. Use this blank platform to design whatever you want that needs to fit well in a wallet. An example of a possible build would be the coin holder available on my profile. Fun fact: 85.6/53.98=1.585 which is very close to the golden ratio of 1.618 (https://en.wikipedia.org/wiki/Golden_ratio)