The size LARGE used for keeping baby stroller. And the size SMALL used for baby car seat.Webbing handles for easy lifting. The Double shoulder straps allow for carrying it like a regular backpack without making you feel uncomfortable. Ideal in case you carry a lot of luggage.nDesigned specifically for travelling: Kidsyu0026#39;s premium car seat bag is constructed to last several trips.nSave money on checked luggage fees and simply car your babyu0026#39;s car seat with you on the plane. Brightly colored and secure - it makes travelling a pleasant, hassle free experience!nKeeps your car seat intact and effectively protects it from wear and tear as well as dirt and bacteria that could harm your little ones! Protects stroller from dirt and germs. The size of Small is used to baby Convertible Car Seat. And Size Large is used to baby stollers.nCompact u0026amp; convenient: Stuffs quickly into attached zippered pouch. Compact to fit in diaper bag or travel bag. Dimensions: Large:119*55*33cm, Small: 46*46*86cmnLUXEHOME baby car bag made of extremely high quality and supremely durable ballistic nylon. This maximizes its lifespan and promises to give you the best value for your money! Also the ergonomically designed straps allow for carrying it as a backpack. Alternatively, you can also use its durable front handle as a carry bag! Rest assured you will never lose it, the specially designed pocket for personal information. Simply write your contact details in there and skyrocket your chances to find it if it ever gets lost!