this is kind of funny for me i had some epaulet chinos in 28 i washed them on hot and dryed on hot to get out all the length shrinkage before i'd get them hemmed 2 times in a week to make sure. i take them to the tailor she goes whats your regular inseam i told her usually 30 is good but do 31 on these knowing my luck they'd shrink some more later. she was like are you sure? i was like yes.
well i just washed the epaulet chinos again on cold and hanged dry yesterday put them on thought i was imaging that the break in the pants has changed. went to measure them they shrank to 30" lol. oh well looks even better now
not to mention a lot of the other dimensions went down slightly. yes i do use a tape measure regularly lol.
Cotton is a funny fabric, you may find it stretches back out, even the inseam a little, with wear...