This carrier has 3 different uses. You can use it to carry your dog or cat. It will fit under an airline seat or it's perfect for taking your dog/cat to the vet. It can also be used as a car seat and you can adjust the height that your dog/cat sits at. It can also be attached to your bike handles to be used on a bike ride. This is for small dogs or cats. Measures 16x12x11.5 inches.