Pacific Play Tents Institutional 15FT Tunnel It doesn't get any bigger than this. Outrageous, this 15' Institutional Tunnel is 15 feet long and 24" in diameter. Absolutely the ultimate in play tunnel fun. Designed for the "Big Kids" to play in. Tunnel excellent fun for developing cooperative play. Great for muscle development. Stimulate the imagination for creative playtime. This innovative design incorporates or new "padded interior" system, for more comfortable playtime. Wipes clean with a damp cloth. 15' L x 24" W x 24" H.