Sizes: The pet carrier bag has a very suitable size for small pets, which is 5''x 5'' whole pouch body, and the zipper opening of the bag is 4''x 1.8''. Materials: The carrier bag is made of good eco-friendly, non-toxic, odorless, safe materials. The pouch body is made of straw mesh, the bag zipper opening is made of good strong quality plastic fiber, the mat inside is soft flannel when the shoulder strap is made of cotton fiber. All these material are safe and comfortable for your pets. Widely Applications: The carrier bag is perfect for small pets, such as hamster, little hedgehog, sugar glider, little squirrel, gerbil, etc. It is easy to open and close up, which can keep your pets safely and comfortable inside. Also with the long shoulder strap, you can bring your pets anywhere you want. This pet carrier bag is only suitable for small pets. Please measure your pet's size before purchasing.