LovinPet xxxlarge pullover onesie. Dog pajamas

Bought this off Amazon and missed my return window. It’s too big for my pit mix dog. She weights 75lbs but is short in the body. The sizes are in one of the pictures. This is an xxxl and would probably fit best on a Great Pyrenees or something that size. This has buttons on the top but doesn’t open. If you need additional information just let me know.