Send Invitations in Style with Custom Printed A2 Envelopes A2 envelopes are great for sending smaller invitations, announcements, and greeting cards in the mail. Customize the design with your organization's logo and return address on the back flap. We offer recipient addressing as well to save you both time and money. A2 envelopes can be printed full color on the front and back flap (no bleeds). A2 Envelopes FAQ What's the best use for envelopes like these?With this size, A2 envelopes are best used for sending invitations, greeting cards, note cards, announcements, and photos. What's the enclosure size?A2 envelopes are 4.375" x 5.75" on the outside and can accommodate an enclosure up to 4.25" x 5.5". Are these gum-sealed? Yes, our A2 envelopes are gum sealed, which means they have a water soluble gum strip that you lick to seal the envelope. What type of flap does this envelope have?A2 envelopes have a square flap. Can I print envelopes with a full bleed on the sides?At this time, we cannot print envelopes that bleed off the edges. We need at least a .125” blank margin around all sides for proper printing.