Note that this only applies to Jennifer Garner. You may need bigger envelopes for different stars (ie, Kevin Weissman sends out 8x10 signed photographs)Tommy said:The envelope needs to be big enough to fit a 5x7 photograph in it. As for postage, I'm not sure how that runs in Canadakylo4 said:I was wondering how many stamps and what kind of stamps to use to send my letter to Jennifer Garner. I live in Newmarket, Ontario, Canada if that helps. I really, really, really, want an autograph from her. Even if it is preprinted. Can somebody please tell me the questions that I'm asking please. Thank you, it would be much appreciated.