I got a call from a friend who's daughter's hen was attacked by a hawk. They said it's back had a wound. I told them to keep the hens secure, and bring the injured hen in the house an put flour on the bleeding wound. The kept her in the house a few days an soon it laid an egg. They wanted to put it back with the others. I made it a chicken saddle out of cloth, so the other hens would not peck the wound. I just guessed the measurements after seeing a pic on line.