To determine what size of diamonds look good on you, it would depend on how big or small your ears are. Why don't you just go get a few cubic zirconia from walmart or target and try them on at home for a few days? Then you can decide what size looks good on you.
And you can personally message Ame if you just want her opinion. There's no reason to start a new thread if you're just looking for her opinion.
HTH!
my subject line solicits opinions from others, not just ame.