I purchased these for the second hole in my ear lobe and they are the perfect size, 0.12 carat each stud, for what I was looking for.  It comes with a certificate of authenticity.  They would also work for a 5-6 year old girl.  The post are small but the holes in my ears are very small and hard to insert a stud.  I didn't find that they were not sturdy enough and should not bend.  My intent is to wear these 24-7 and only take them out for cleaning.  Since I only received these today, I cannot speak for their durability long term.