28'' would probably be the smallest, any smaller and you'd look weird
34'' is the max..any more and you need to loose some weight (no one can have a waist naturally bigger than 34'' at 6'1 200lbs without having bf% over 16-18)
so id say 31-32 is idea...the smaller the better though...gives you a better taper and X frame
im just asking cause im pretty built and i dont know maybe i gotta buy new jeans, but i wear a 34x34 and it feels just a bit and thats just a bit tight. Maybe ist cause I ve washed it so many timeslol.