The MyPet Petyard Passage 6-Panel Pet Exercise Pen is a safe, portable containment area which features an exclusive swinging door for pets. The 9.5 in. x 8 in. door swings freely, allowing your pet the freedom to enter and exit this dog exercise pen as they please. The small door also locks for containment, offering you peace of mind. The pet pen encloses up to 18.5 sq. ft. of space and is 26 in. high. Increasing or reducing the size of this play pen for dogs is easy; simply add or remove panels for multiple configurations for all stages and phases of your pet's life. Adding a Two-Panel Extension (sold separately) will increase the size of your Petyard to 34.4 sq. ft. To make a cozy crate for a small dog or puppy, simply remove 2 panels.Note: This product may require up to 2 additional days for order processing prior to shipping