The A6 invitation or announcement style envelope is commonly used for baby shower invitations, wedding showers, holiday cards, thank you cards, graduation announcements or any event you want to give special attention to. These envelopes stand out to the receiver in a stack of mail. This A6 envelope is inkjet and laser printer compatible; customize them to meet your specific needs. This is the size envelope you need if you if you want an envelope to fit a 4x6 card.