These luxe envelopes are crafted from premium paper and feature modern square flaps that can be sealed by moisture. Our A2 envelopes measure 4.375" x 5.75" and perfectly fit standard A2 size (4.25" x 5.5") cards, like Minted's personal stationery and wedding enclosure cards. Not sure which Minted cards fit? On the product details page of the card, look for the "Dimensions" information. Return address printing is available.