what comes with the official letter/package?

<p>u mich resent my official acceptance snail mail..is it just a thin letter, or is it a fat envelop, or is it a package?
what comes with it?
and do they ship it regular mail or priority?</p>

<p>Big package (full sheet paper sized, unfolded). A bunch of informational things come with it, and they ship it priority...</p>