not sure about the size issue but as an aside;
I have the Ronin 2L iPod jacket (it was a very generous gift from my sister). Its great when it works, the buttons are a little dodgy, sometimes I have to squeeze really hard to get it to work, sometimes volume up makes it pause. I've heard of similar problems with other peoples. Burton will replace it if its faulty (if they have any ltd edition stock left) but its not an ideal situation for such an expensive item. The back pack may be better as the buttons are in the strap which is more sturdy than a sleeve.