Rookie question for the day: How are guides and tip tops measured? What does 1 mean when I see that a guide is a size 1? Where do the measurments come from foot to foot, inside of foot to inside, does it have anything to do with height? Ok same thing with tip tops. I used some calipers to determine the size of my rod tip (3/16 for one and 1/8 for another) but can't figure out what tip top size that corresponds to? Is there a chart or something I'm missing?