MPW Big Boy Chest Waders Sizing Specifications:
For the Big Boy measurements, simply add 16 inches to each measurement
Please reference the chart for Grand Prairie and Big Ditch waders,. You will see that a size 12 Regular has a 49 inch chest and a 48 inch waist.
So a size 12 Big Boy wader would have a 65 inch chest and a 64 inch waist. This formula will give you the measurements for any size Big Boy wader. As far as min and max, the wader has adjustments on each side to pull it in closer to the body, so it can be fitted to the wearer.