Do u have much tissue or are you boobs quite tight? I don’t think its too big. I had my BA yesterday and had 295cc round moderate and could have afforded to go bigger if i wanted to. If you look at a few of the girls pictures on here who have had 400+ cc and started off a double A, they look natural. 350 is about average to be honest so its dependant on what look your going for. I only wanted a full C as im small and petite so happ with my 295cc, others like high profile etc so realy depends
On what look your going for!