hey guys

I'm new to Maya and have a short question regarding the scaling system.

What I want to do: Scale objects in mm, cm, or whatever

What happens: For example when I create a cube it has the scale 1/1/1. If I create another, smaller cube it also has the scale 1/1/1. So if I change the scale on those cubes to 5 they obviously wont be the same size...

... so for example, how can I make one cube 100 cm high and another 5 cm?

Thanks a lot in advance!