I'm not an unusually sized person (6'1", about two bills). My jeans are 32/33 or 32/34 depending on the manufacturer (Tommy, Polo, Mavi, 32/33; Hugo Boss, 32/34). Measured with a tailor's ruler, my waist is about 37".
I cannot find a diaper that fits well. The old Dry 24/7 mediums were just about perfect, but the new ones are smaller. :/ NorthShore Supreme, a medium is too tight and doesn't come up far enough, but I swim in a large.
Same with the "cloth" covered iD Slip Medium Maxi; medium (‘fits 28 to 40" waist/hips’) won't even tape up (the legs won't reach, and the upper tapes just barely connect with the front), but the large (‘fits 39 to 59" waist/hips’) I again swim in (the top comes up over my belly button, and the back is very high too - not exactly what I'm looking for in a product meant to be discreet!)
Also the Rearz Inspire, and the new ABU Simple. And, and, and ...