Calibrate your 3D printer with a test you won't just throw away afterwards.

The blok should measure 16mm in all dimensions, and when you're done you can use them for standard PrintABlok play.

PrintABlok are interlocking building toys created by the 3D Printing Professor, designed to work well on home 3D Printers. PrintABloks can be built in all 6 directions, allowing for gravity defying building unlike any other building block out there.

If you are interested in getting a greater variety of blocks, including articulated blocks and decorative elements to make cool builds, you can check out premium sets here:

http://printablok.com