Even more tiny than expected- and very difficult to put in/apply back piece
I would not recommend this challenge to install these in your ears for anyone. I was looking for just a simple small stud earring to wear day/night (while sleeping) to use during the pandemic when not going in to the office (and thus, putting in new earrings every day). I wanted earrings that I could leave in overnight/while sleeping and not have issues with irritation from the metal or backs. This seemed a good solution - but these are truly itsy-bitsy- including the narrow posts and backs.  The posts are not likely to keep patent the same diameter needed for other earrings, and  the backs are very challenging to ensure they are even on the posts- and then screwed in ok.  I'd recommend do this only under high lighting conditions, all drains plugged and a wide working counter top so to not lose the backs in the attempts.  Overall, I may be stuck with these since I finally put them in my ears, but I would not recommend to others looking for my same objective.
Rating: 2 stars