We used this once, but our dog was too big for it. He weighs about 45 pounds. It's more suitable for dogs under 25 pounds, rabbits or other small animals. There are 8 connected panels in each box, each panel is 18" high x 24" wide that forms a fence that stretches 16 feet long. Each 16 foot section of fence has its own door. There are three boxes, a total of 48 feet of fence. Each box will also contain a bag of metal stakes. It looks flimsy in the pictures, but it's firm once the stakes are put down. I just set it up quickly to give an idea how much room was in it . It's in very good to excellent condition. NS