Thanks to Yoox I was able to try on all sizes in various pants Size 4 ft the best despite waist being a tad big. Easy fix. The problem is the seat from thigh down. As the silhouette is tapered, I need extra room. For his chinos are cut in a way even a size 4 is not great. The fabric is too rigid to drape and I feel it looses it's shape when sized up. Size 3 just too slim. His wool trousers on the other hand are great. If it is elastic waist with pleats i can maybe get in a size 3. I am slim 50 now :/ Need large in Ervell fwiw unless outerwear.