We adopted a shelter pooch and werent sure how much she would grow since no one knew her age.  We settled for the 42 inch since its pretty obvious shes part German Shepherd.  The crate is plenty big for our new pet and is sturdy enough to house her for several hours at a time.  She loves going inside and its open for her to see whats goiing on in the room around her.  Thanks, we had looked at a lot of crates before selecting yours and Im so happy with this product.