If you are working with the warehouse management they likely you will want to setup physical dimensions for the products so that you can use the load planning functions for fitting product into a container, or truck for transport. This is important if you are going to be using the rating functional and want to allocate freight charges back to the orders.
Here is a quick walk through.
AX2012 CU8
AX Build 7.0.1265.3015
Cheers
Lachlan