I took a M size for 1.61m and 52 kg. For me it's perfect for the width, I go in without forced on the seams, but that may be too long and suddenly it narrows lot at the knees. Now maybe this is normal! Otherwise the product is comfortable, takes well to pruning, wife well the crotch, is breathable and that's great. Quality remains fragile, special low temperature washes to minimize crazing.