Size: 17"L x 11"W x 11"H MAX WEIGHT 15 LBS Maximum pet dimensions 9 inches tall 15 inches long and 15 lbs. This is a carrier for small dogs or cats if your pet is larger it will be a tight fit. ONLY WORKS WITH CERTAIN AIRLINES Only works for United, Delta, American, and Frontier. 17 inches long, 11 inches tall, and 11 inches wide meets airline requirements for fitting under seat. EXPANDABLE SIDES The sturdy square frame provides maximum space and prevents collapse, allowing your pet to relax while traveling. MAXIMUM STORAGE Two velcro pockets and a large mesh pockets to keep all of your pet supplies sfae and organized. LOCKING HANDLE Handle locks into three positions for maximum convenience. Other carrier handles just fall to ground when not being held.