Simple credit card wallet - based on ideas from other models here like these: http://www.thingiverse.com/thing:465818
https://www.thingiverse.com/thing:541996
Sized to accept about 4 credit cards on one side, 1 RFID card on the other.

Weighs about 20g.

I've been using it as my only wallet for about a year and really like it. Hope you find it useful.

Da Vinci 1.0A hacked with E3D-v6 and Repetier V92

Doesn't Matter

No

.3mm

Solid

Prints well standing with the thinnest edge at the top. I didn't print with a raft or brim but it may be helpful if you have issues with adhesion.

Requires an elastic band - I used Dritz 9507B non-roll 1 inch wide elastic you can get from JoAnn's or your local craft store like this: https://www.amazon.com/dp/B004ALJMSQ/ref=cm_sw_su_dp. Sew a loop of 1 inch wide elastic with an inside dimension of about 2 1/4 inches. You may have to trial and error to get the fit of the elastic as tight as you want. I sewed it by hand, could be done on a machine if you have one. The right size rubber band may work as well.