In Sketchup for example you can chose default unit. If you chose cm, you type in 17 and the line will be 17cm. Or you can choose to type in 1.7 and the line will be 1.7cm. Or you can change to metres and type in 3 and the line will be 3 metres. Or you can type in .3 and the line will be .3m.
When you're trying to type in precise measurements in Blender, such as 16.4mm X 12.5mm X 8mm, I have to either type the size in metres, or specify a different unit at the end of the number.
How do I tell Blender to assume that "7" means "7 millimetres," without having to put "0.00" in front of it?
Or is the only way to make everything in metres and treat them like millimetres and then downscale everything by 1000 to make the measurements true to the plan?