Set of 12 panels. 13.5″ × 13.5″ each. The soft rounded edges and burr-free connectors let you know that Midlee designed these playpens to protect your Guinea Pig’s feet, skin, and teeth (even with chewing Guinea Pigs). Cages are confining, so create a big play space in minutes, with plenty of room for food bowls, water bottles, toys, huts and even litter and bedding – just place your Guinea Pigs inside their roomy run and smile as your little one.