Pet Carrier: 17.5 L x 11 W x 11 H, Recommended max load of 16 lbs cats small dogs. Please do not choose your carrier based on weight--please reference your pet's length and height in selecting a pet carrier size. Fits for under-seat dimensions of most airlines. Every airline has a specific set of rules and regulations, please contact with airline before flying with your cats small dogs. Mesh windows for ventilation, top and side entry with locking zippers for safety. Carrying handles, adjustable shoulder strap which can also be used as seatbelt, and back strap can fasten the pet carrier to your luggage.