I'm considering the vintage tuxedo below, which has so many features I like (besom pockets, no vents, peak lapels, fishtail trousers, and most importantly, good fit). However it has bigger lapels than I had previously considered. Looking here for SF's thoughts.
I am about 5'9", 145lbs, medium to narrow shoulders. My general sense is that for my body type, wider lapels have the advantage of broadening my shoulders, but the disadvantage of adding a horizontal line to my figure, which is somewhat on the shorter side.
Tags: Tuxedo, double-breasted, peak lapels, big lapels