This business card holder is designed to hold standard cards for the U.S., Europe and Australia. The actual size of the card area is 92mmx58mmx25mm (depending on orientation).
I try to design these to be printed without supports and may provide a 2 part design to accomplish that or per any notes below.
I have designed hundreds of remixes. If you want to search by the type, visit my profile: https://www.thingiverse.com/ToaKamate/about