I fish larger nymphs all year long, now I fish the little ones as well. Say 18-20 But more times than not I drift some good size ones. It really depends on the person, some people feel a size 14 is to big. Some wouldn't even consider anything bigger than a size 10 and rarely at that. For the most part for me 8,10,12,14's with smaller ones along for the ride, depends on water depth and speed of current. Even have some #6's much as most people don't want to hear it they take fish regularly as well.