This is a set of 4 shoes. I am selling them because the size didn't fit. The size is A. The two shoes on the right in the photo were worn once for a walk, but there is no noticeable dirt. The two shoes on the left are new. Please see the last photo. The fifth photo shows the shoes being worn; there is some hair inside, but I will try to remove it as much as possible before shipping. Please refrain from purchasing if you are concerned. By the way, the dog breed is a Border Collie.