50 x50 with mat. Certified Safty and Durability :Li’l Pengyu baby play pen adheres to the highest U.S. safty standards, including CPSC and ASTM certification.It features durable Oxford cloth with secure stitching for longevity and a 23.38-inch height to prevent babies from climbing out.Safty is further enhanced by foam-covered corner connectors and a gap free design. This playpen includes 4 pull rings to support your baby standing and walking attempts, a zippered mesh door for independent access , and side pocket for storage essential.