Review on 🐹 Convenient Portable Carrier Cage for Hamsters, Guinea Pigs, Hedgehogs & More: Breathable & Secure Transport for Small Pets by Jeanette Green

We bought this for our daughter to carry her guinea pig in. It's not too big and not too small for him. He can turn around in it. Of course, I wouldn't recommend keeping your pet in such a small space on a regular basis, but it's good for car trips, which is why we bought it. He can hold out long enough for us to come and set up his cage. The reason for the 4 stars is that the small plastic flap at the top is not as thick as I would like.