These earrings would be perfect if it were not for the fact that the screw back is so small you cannot grasp it to put it on.  The threads on the post itself are nice and go way down to the bottom.  If you are able to even put it on the post and start to screw the back on, it goes crooked and locks in place so you can't turn it to tighten it.  And since the earrings not near the lobe, it pitches forward and dangles out the front.  Not a good tight fit at all for a post earring.  I can't wear them as I have no screw-backs that will fit and other backs were too large.  I read this on another review but thought 'they can't be that small' but they are.  Live and learn. It's a shame because they are nice quality.