I am short, stocky, bit of a gut and twisted spine, so, wear my strides looser than most will.
I consider these to be THE woolen pants for most BC mountain wear and bought two pairs some years ago. I usually wear a 43-44" pant and bought my Filsons in 46, just right and they are the cats ass in late season rain and snow, which we get a LOT of here.
The only issue is wind and for that, I simply use heavier under pant longjohns of merino.
I have used a LOT of different pants over decades in the bush and if I could only have ONE pair, the Filsons whipcords would be my first choice.