STL dimension Bug - macOS Beta Version 3.56.1 (665)


  • Change unit of measure to cm
  • Create a 5cm cube
  • Export to STL
  • The result is a 5mm cube

I validated the resulting file in both Xcode and Prusa Slicer and validated against the same cube made in Fusion360.

You can see a video demo of the issue here: iCloud

Hi, it’s not a bug, STL does not contain unit information, so the actual size of the object will depend on how you export it:

Oh wow, ok, I wasn’t aware of this! Sorry for the noise then.