I bought these pretty studs for my 7 year old granddaughter.  I was pleased that the posts weren't too long that they poked her while she sleeps, and her mom appreciated that there are several pairs, so if she loses an earring, there is a replacement readily available.  They have a nice sparkle, and are just the right size for her.  She has a reaction to a some metals, but she's been able to wear these with no irritation at all.  Am thinking of getting some for myself.  :-)