TrustyPup 2-In-1 Grey Medium (pets up to 16 lbs) Carrier is a Guaranteed On-Board airline travel pet carrier and is compliant with most airline's specific rules and regulations allowing pet parents to travel with peace of mind. Designed for smaller cats and dogs, the, size of carrier is 18" long x 11" wide x 10. 5" high. There is a handy 7"x5" side pocket to put your leash, treats or waste bags in! Details: Ventilation on three sides, strong durable base allows carrier to be used as backpack or traditional carrier. ** This item is new and unused but please note!! It is missing one strap so it can be used as a carrier over the shoulder (as pictured in my photographs) but not as a backpack. Its intended use is backpack AND/OR over the shoulder. So it has the capabilities to do both but I only have 1 strap. Priced accordingly/AS IS