I got the 18G 7 mm and and it fit perfectly and looks great! I have sensitive skin and have had no problems with this. I gave it 4 starts because I found it extremely difficult to close. It took me forever to finally get it closed, and it was pretty painful due to the amount I had to move it around. I finally got it closed with some small needle nose pliers used to make jewelry. It was like it wasn't lining up properly.... but after that it has been great. No issues. I definitely like it more than the ones where you slide the end of the earring into the opposite end. Overall, Im happy with the product. It arrived quickly, it was packaged in a small plastic envelope holder, and it has met my expectations it was exactly as described.