The item is excellently made, as expected, and seems quality through and through. Getting my dog used to it was a challenge but she is ok now. I trap/skeet shoot so I wanted something she could wear for extended times. I got a size 3 as she measured on the low side of that at 15.5 inches, however, it seems very tight and wish I had gotten a 4. I have a Golden Doodle so maybe its the extra hair compared to a smooth coated breed. Hopefully it will loosen up/stretch with use. I would still recommend.