I expected to open these up and find tiny little white topaz earrings because they are relatively inexpensive. I was pleasantly surprised to find them not only bigger than I expected, but they sparkled just like diamonds. The post is long enough for the thickest ear lobes and also substantial, not thin like a lot of posts. The clasps are strong and fit perfect over the notch in the back of the posts. I have bought posts like this where the clasp falls right off because either the post is too thin or they put the wrong clasps on. Both of these fit perfectly. I am wearing them now, through the Christmas season in my upper ear holes. They look perfect with all of my silver Christmas earrings and so far, they haven't fallen off (a problem I often have with posts). Sometimes, I switch out the clasps for the rubber stoppers, since they are almost foolproof. But I feel safe enough with these clasps to leave them in, so snug are they. Also, they aren't too tight, which often happens. I HIGHLY recommend these solitaires as Christmas gifts - best quality I have found in a long time!