I bought this for my 4kg dog, but in my opinion, it was bigger than I expected and I didn't use it. Assembly is easy, just by closing the zipper. I assembled it once for photography. It's foldable, and easy to assemble and store. It can be used as a handheld or shoulder bag, 2-way. This pet carrier bag is very convenient for outings such as regular checkups at the vet, going out, traveling, driving, and walks. It can also be folded when not in use, making it convenient for storage and carrying. Size: When assembled: Approximately 38cm wide, 25cm deep, and 26cm high. A gray dog carrier bag with breathable mesh panels. - Color: Gray - Material: Mesh and fabric - Design: Breathable mesh panels - Usage: Dog carrier bag - Straps: Adjustable shoulder strap Thank you for viewing.