I am 5'7 feet. Size 38S (size 24) is way too wide and need so much slimming in the sides that it won't look good. 46 is too tight, 48 fits nice, but sadly the sleeves are too long and have functional buttonholes.
Not at all, since their suits and blazers lenght tends to be quite spot on for me, as they by standard are quite short. Functional buttonholes are highly unpractical and makes shortening the sleeves much more difficult.