Best practice for exporting 2D graphics to preserve scale?

When I import my SU 2d export into Aspire, the scale is way off. I don’t have this issue with AutoCad DXFs or anyone elses SU files…
Can someone suggest settings /workflow?

Non- SU Bonus question:
Is there a way to scale objects in Aspire to precise sizes?

No need for yet a third thread on the topic.