Same size as Rota, and worked perfectly. Rota 52s (the typical wool ones, not the garment washed ones) are snug but not tight on me. I took the same size in these pants. There's plenty of give in the waist elastic - through the seat and thighs, they're definitely not baggy, but the pleats give you some extra room and the flannel is a bit stretchy too. I can sit cross-legged in them no problem.