Kubotek Forum

I draw a square 100x100mm.
I print the square with a scale of 1 to a PDF file.
When I dimension the square in Adobe using the dimension tool, it has dimensions of 99.59x99.61mm.
When I export the file as PDF, it has in Adobe dimensions of 99.95x99.95mm.
Where can these deviations come from?
My customer expects the exact dimensions there.