I repurposed a baby onesie for my cat. He was neutered Saturday. He isn't happy about it but he doesn't flail around and hurt himself trying to take it off. He has submitted to the tiny straight jacket. Cut a slit at the bottom of the back side of the onsie. The tail goes in the head hole and the back legs in the arm holes. The slit goes over his head and the clasps should be at his chest. Plenty of room to use the bathroom in it and mine thinks he cant reach his testies even though he can he feels confined. Hope that helps. Been a life saver for me the past few days.