Part "growing" 10% when exported to AutoCad

Hi!
I’m new to sketchup, and just made my first part. It was a little metal bracket that I that I exported to Autocad. From Autocad I sent it to Omniwin, the software for the cutting board.

It seemed to go smoothly, but when I measured the parts they had become ca 10% bigger. One side went from 200mm (in sketchup) to about 220mm (in reality), the holes was at a distance of 33mm instead of 30 from the sides and so on.

Does anyone have an idea of what caused this, and how to fix it?

You exported a 2D DWG while your Camera was set to use Perspective projection. Perspective images cannot be to scale. Switch to Parallel Projection and a standard view before exporting.

Thank you so much!