The IRIS Exercise Pet Playpen can be utilized indoors or outdoors; the pet playpen is portable and provides 8 square feet of play space for pets!;Each panel measures 33W x 24H; door measurements 14''W x 16.5''H; the distance between bars is 1.5'';Dimensions: 35.25L x 35.25W x 24H;To create a more spacious exercise pet playpen, add any IRIS 24'' Exercise 4-Panel Playpen Panel Add-On;Made in the USA of durable, heavy-duty molded plastic, and the playpen will never rust