are the DXF files in centimeters or inches?
What DXF Files are you talking about? Please provide more information so we can help.
In general, DXF files can contain many different units of measurement. Including inches, centimetres, millimetres and feet.
My guess is you’re talking about the free DXF files provided by scan2cad.com ?
This is a totally separate website. A community for helping answer CAD questions.
Luke is right in saying that DXF files don’t typically have standardized units assigned to them. Some programs do tend to assign standard “Units” to drawings, so if you’re using AutoCAD or any similar program, you can actually set the default “Units” in the Drawing or Model Properties.