I had my invitation suite weighed at the post office and they told me it was 65 cents. I weighed it again at work and got 65 cents. My 65 cent stamps just arrived, and I am paranoid that the postage isn't really right and that I need to get them weighed again. My invites are 5x7, so no square charge. Should I take them all to the post office, have them check again, then apply the stamps? Or do you think I am safe just putting the stamps on at home? For what it is worth, the invites are letterpress, 2 pieces of 5x7 (invite and activity details), 1 piece of 4x6 (RSVP), 4x6 envelope with stamp for RSVP and just an outer envelope.