Great size.  The enclosure bars are metal instead of wood so they can survive a chewing puppy!  End door and side door so arrangements are endless.  The only reason that I gave it a four instead of a five, is because the wider side doors do not latch tightly.  They close sufficiently to prevent escape but flap and bang when the puppy jumps and create concern for paws getting caught.  There is nothing to secure the center of the doors to the crate itself.