I have a couple of this earring backs but not enough so i ordered them.
when they first arrived, they were a lot smaller than the ones i already own and I thought they would not work however, i was incorrect.  They work even better.  I have long layered hair and all my fishhook earring  always got caught up in my hair and if i did not notice them, they were lost for good.

I tried them on three different size earrinsg and they worked wonderfu, regardless of the sizel.  They were not hard to put on eventhough they are small.  They kept all the earring secure and they could not be seen behind the ear.

i recommend them to anyone who wear these types of earrings and for such a low price, it may save an expensive pair of earrings