This Pacific Play Tents "Find Me" Giant Play Tunnel has a 9-foot extended length and is a big 22 inches in diameter. The flame retardant 70 Denier solid blue colored nylon meets CPAI-84 specifications. Sturdy spring steel construction for lasting fun. Collapses down for easy storage. Because of its larger diameter, this Giant Play Tunnel is designed for children from first through fourth grade. A great game would be finding out how many elementary school students can hide in the tunnel.