Banana Republic Peacoat

Size small, lightly worn peacoat from Banana Republic. Really nice and high quality but unfortunately does not fit me any more, too small (I am 5'10, 160 lbs, medium build). Would ideally fit a young man (early to mid 20s, 5'7 - 5'11, 140 - 150 lbs) who is still filling out and with room to grow.