This is a simple cube that tests the settings of your 3D printer. I tested it on my MakerBot and it came out within .5mm of 40mm on each side.
The two of the corners came up a bit. I'm going to make a bigger raft later and see if I can correct that.
Print it out and measure! 40mm Cube Test Object
is licensed under the Public Domain
4 w x
4 d x
1.575 w x
1.575 d x