My babies each have their own crate, and I bought each for about $40 over at Petsmart. Here's a link:
http://www.petsmart.com/global/produ...ext=kennel&N=2
We got the smallest size which actually has a little Yorkie on the picture of the box. It's dimensions are 36X27X24. I found it to be the perfect size, not too small and even now that two of mine are grown they still use their crates as their little dens, they hide toys and when we have company they tend to nap in their crates. Plenty of room to stretch out; it's a little large for my Ocean, and at night I put him in a little cat carrier, but when we are out during the day he's in his crate with food and water.
Lol, hope this helps; I also love that there are two doors one in the front, and one on the side. Makes it very easy to clean and also to put a little bowl of water in the back without spilling it.