Staples White A9 Invitation Envelopes with QuickStrip Flap - 50 PackVersatile enough for business or personal use, these Staples A9 Invitation Envelopes are designed to send event invites or announcements through the mail. Measuring 5 3 4" x 8 3 4", these envelopes can also be used to send photos as large as 5 x 7, cards and other inserts as needed. The square flap and side seams provide a polished look and the white 24 lb paper offers a crisp, durable finish. These envelopes also have a QuickStrip sticker closure for