the stud earrings are awesome !!! but the silicone back no!!  after I got this stud first thing I did was take the one i was wearing and put this ones , I loved them very much !! until 3 hrs later my friend told me where is you other earring !! I don't even notice when it fall , just because the silicone back was lose , so now i only have one stud and the other one in the mall ,when i went to get the christmas gift for my family =("" , if you interested and this earrings please get it ! but with a different  covered back ! something that is more secure .