Sherpa Park Tote Pet Carrier, Small Brown

Does this bag stand on its own? I had a soft bag before and when I set it down on the ground the bag fell over and so did my dog.

hi is this bag sturdy and will it fit a 13lbs maltese?

What are the dimensions of the small bag and the medium bag?

I need a pet carrier that i can use for either 2 ferrets, 2 guinea pigs or a 15lb cat for trips to vet (separate trips of course), would this bag do?