These fake nose rings have a round edge on one side so that when you are placing on your nose that goes in one side and it looks like a normal nose ring piercing from the outside without having a sharp edge stinging the inside of your nose.
Sadly the pictures show ones that have a double sided circle which is something my daughter was interested in because she likes the look of having it in the moddle area of her nose and it would have been less painful, but this still works for it just one side will still have that prickly pain and the other wont.
All-in-all I do not regret getting these, it was a good purchase and my daughter and I will enjoy using them (different ones of course).