First off, from here on out, I'll just do the simple folded shirt picture, so please excuse the mess this time around... And my button detail shots haha. I can measure any of these if any of you are interested. PM me for details.
Warning: Spoiler! (Click to show)
first, that shirt is PURE SEX.
second, i don't think the 44 is a sleeve length. from what i've read, italian shirts all come in one standard sleeve length, and it's up to the shirtmaker or whoever to adjust it to your correct length. the "44" is just "17.5" in centimetros.