i am not sure about how that sizing actually works. because acording to that i could where a size small. i have a 36 inch waste and i know there is no way i could where those. i guess when i ordered mine this year i didnt look at that first i just went by my shirt size. i where an XL shirt, i am six feet tall even and weigh 215 and the XL fits me perfect. on the sizing chart it says the XL has a 49 in waste so i dont know. sorry this probably wasnt much help. my suggestion would be call clam corp and ask them they will be able to give you more assistance.