Export to .dxf other dimensions

On my school we are useing Sketchup Edu (edu.sketchup.com). I am facing a problem with exporting a file to .dxf.
For example, I drew a rectangle in Sketchup that is 25cm by 10cm. If I then export it to .dxf and open that file the dimensions are different, lets say the rectangle is now 27,54cm by 11,8cm.

  • I see the drawing from top view
  • I experimented with the ‘Persepective’ and the ‘Parralel’ orientation
  • Also changed the export to ‘Full scale (1:1)’

I cant get the right measurments to come in the exported .dxf file. Does somebody know what I am doing wrong?