I like the tortoise frame with the G-15 / green lens and the 52mm size is a perfect fit, not small and not big either.  I have a 55mm black with G-15 but it is annoyingly huge for my taste.

I've read comments here about being counterfeit.  Thinking that I can always return, mine came in as genuine RB.  I can tell because as I have 3 other Ray Ban sunglasses.