Please help! How do I export my dxf drawings to scale? For a 1220 x 2440 scale.

Please help! How do I export my dxf drawings to scale? For a 1220mm x 2440mm scale.

The drawings export only seems to go up to size A0 paper size.

Needing to transfer files/to scale drawings easily over to cnc for cutting, the cnc guy can use dxf and dwg files