the first rule is; choose a trouser for its fit in the hips, seat and crotch. why? because you can take in or let out the waist, and also taper the legs. go to a fabric store and buy a tape measure. about 2 or 3 bucks. measure your seat then measure the trouser seat. try on the ones that pass the test. that will save you a great deal of shopping time. hint for athletes with heavy thighs. measure your thighs, then measure the trouser thighs.