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!   gives pet parents the best of all worlds:
2-in-1 Backpack Carrier is an airline-approved travel pet carrier that fits under most airline seats, easy-to-use with comfortable, adjustable straps.
Multi-Use: Use the carrier laying flat in the car, plane or train and as a backpack when strolling, hiking, bike riding, or brunching!
Details: Ventilation on three sides, strong durable base allows carrier to be used as backpack or traditional carrier
Tested For Safety: always makes safety a priority, They do not contain small parts, long cords or other hazards, so you can feel confident in letting even the littlest family members enjoy some quality bonding time with their feline companions.