Sketch Up Question

[Ran4it2]

im starting to design a box mock up with sketch up but i was wondering how do u make the lines think like 1/2 or 3/4 inch so it looks like the thickness of the wood i just made the whole thing and when i tried to make my port all it did was draw a line bit does any1 understand my question?

[PV Audio]

If you've got AIM, IM me. I'm not designing for a few weeks, but i can answer that question if you can explain it better.