I love this harness. I saw it another dog at the groomers and got the brand name. I ordered the next day. We love, love, love it! Our pup has gotten so many compliments on it. I wish I would have gotten a large instead of the medium as I had to extend the medium to the max. I can easily get 4 fingers under it so feel that it fits well now but am concerned about dog adding poundage. He loves his treats!! He's a doodle and although he is only 36 lbs., he has a big chest. So glad I found your company. I am definitely a return customer!