We purchased these for our daughter's tenth birthday, when she will finally get her ears pierced. She will love them because they are purple, so we are happy enough. However, I should have grabbed my metric ruler to see how small 4 mm really is. These are fine for a young girl. The one star demerit is because the stones aren't very nice and the quality overall is just basic. For $3+, in combination with a few other great items (shipping was flat fee for all items combined), it works for our purposes.