I'm about to head out to buy some cheap store brand diapers but was wondering which measurements to base the best size off of. I measured my waist at my navel, and it came out as 33 in. Usually this is towards the middle of most medium ranges. However, I also weigh around 175lb and am 6 ft. tall. A lot of diapers have these measurements towards the beginning of their large size. Which measurement would prove more accurate for diaper fitting?