They have everything from Short, Regular to Long. I always thought I was a 44/46R turns out in regards to their SuitSupply sizing I'm more of a 44S, I never would have thought to go the short route with the jacket but in regards to their sizing the short was much better fitting than the regular. The navy suit was simply great off-the-rack, and just needed some minor adjustments, like shortening of the sleeves (functional buttons) and to get pinched a tiny bit on the sides. Only reason I didn't buy is that I didn't go with the idea of spending $469 plus tax and alterations today lol.
Wis, it's an actual store. They have one half of their second floor of suits, from the smallest size being a 36S to their largest sizes being a 52 or 54L. The opposite side of the store has their stand-alone blazers, shirts and by that I mean a plethora of shirts. The shirts alone, the variety is amazing, from 13-18 and 13L-18L, ties and shoes are scattered across many displays. The alterations I'm not sure of the pricing but I know if minor they can be completed within an hour.
Edit found the pricing for suitsupply:
http://us.suitsupply.com/in-store-tailor/content-page-tailoring-instore-tailor,en_US,pg.html