hfss print model

hi guys!

how do i print my design to scale?

i tried exporting it in jpg, bmp but it is not to scale

i also tried DXF then opened it in Autocadd, again it is not to scale?

i am simulating antennas and i would like to make the actual already to test it.
but i can't! i need to print my design wit the right dimensions

help!

thanks all!