<p>So both of my teachers that I asked for recommendation letters are going to mail them in and want stamped and addressed envelopes.. What size should I give them? All I can find when I search is that Stanford requires 9x12 and I am not applying there, so what do most other colleges want?</p>
<p>Regular business size envelopes are just fine - you don’t need 9 x 12.</p>
<p>Thank you!</p>