For those of you that have crates, what size is yours? I have a 24 L x 18 W x 21 H" for Lexi. At the time that was the smallest metal one that PetSmart carried in the store. They now carry the 22 L x 13W x 16 H". I was wondering which size I should get for the new puppy? I know way to early to even think about buying it but I'm trying to price check so I know how much the stuff I need to get is going to cost.