We have an Airedale terrier and so she is a fairly large dog and this crate is perfect. We used to hate leaving her in her cage but with this pen she has room for her bed, and room to move around a bit. Couldn't be happier with our purchase!  The pen is fairly flimsy though so if she is restless sometimes we come home and the cage is moved so just make sure you have it on carpet so it doesn't scratch the floor