No bigger than the car seat itself, Strolyy can fit everywhere, Strolyy is the only car seat carrier with the ability to collapse on all 4 sides like a camping chair making it portable and easy to store. Fits in any vehicle and can even be opened one-handed. It accepts one infant car seat into the carriage frame without having to remove the child from the infant car seat. The car seat can face either direction. A convenient large storage basket is located beneath the seat of the frame allowing parents on the go to never be without their necessities. Safety features include front wheel swivel locks, rear wheel brakes and the safety strap for securing the car seat into the frame. Strolyy accepts ALL brands of infant car seats. Strolyy meets all the requirements under ASTM F833-15 for carriages and strollers.