Adult Males require a crate that is 40” long, 26” wide and 32” tall or taller. Adult females require a crate that is 36” long, 24” wide and 32” tall. I recommend that dog owners use an adult male sized crate for both males and females. The extra space allows for more stretching out.
During puppy hood you will need to divide off a portion of the crate until they learn to hold their bowels and bladder better. A large space for a small puppy sometimes encourages them to go “potty” in one end, and sleep in the other end.