Part measurements? I assume you mean the dimensions of individual components as they relate to a chassis? Some major dimensions you'll want to know are;
- Graphics card length
- Power supply length of unit and length of cords
- Motherboard dimensions (the other posters have mostly covered this)
- 2.5" vs 3.5" drive bays
It really comes down to what components you plan to use.
I'll find the parts I've bought and post them here, I have some cases like the COOLER MASTER HAF 932 Advanced RC-932-KKN5-GP in mind