I only tried it on after purchasing. Unfortunately, it was a little too small for my dog. As you can see in the pictures, there are some wrinkles. I will fold it as is and ship it. * It will be folded small and shipped via Yu-Packet Post Mini. For sizing, it's best to measure your dog's body and compare it to a jumpsuit or romper that fits them well. The material isn't very stretchy, so it's best to avoid this if your dog is right on the edge of the size.