Just arrived today-- very pretty!!!! BUT was disappointed when I put them on, because the post is at the top of a relatively "longer" stud earring causing it to hang funny, turning inward.  Sad, because they don't stay on the lobe in a becoming way.  I will try a larger flat back and if that does fix it, they will have to be returned.  WAH. Like them otherwise.  Posts need to be in. Middle of item.
Update. Wearing them now!  Lovely at church. Lots of compliments.  Large plastic backs are recommended to better position on ear.