This part isn't true anymore. I know people used to use that as a guide, but I have bought tons of pins at Disney recently where the Mickey heads on back have borders. One example, the 2 pin set of Lightning McQueen and Tow Mater wearing Mickey Ears. I bought three sets on card and all of them have a border around the outside. The Mickey ears do not go to the edge. On the other hand, I bought three sets of the Princess shoe pins on card and there is no border around the Mickey heads... they run off the edges, and the paint is glossy. However, I traded for a shoe pin from a cast member and the pin had brush strokes and a border around the Mickey heads on back. It occurs on some pins direct from Disney, but not all. So, it is no longer a good indicator unless you have a genuine from Disney pin to compare it to that is a match. Hope that helps.