USES: RSVP Cards, Invitations, Announcements, Notes, Greeting Cards and Thank you Cards EVENTS: Weddings, Parties, Holiday, Corporate, Banquets, Showers, Birthday Size: A2 Invitation Envelopes / 4 3/8 in x 5 3/4 in / 4.375" x 5.75" / 111mm x 146mm Quantity: Pack of 250 Color: 70lb. Classic Linen Avon Brilliant White Printable on off-set printing presses and some home printers. A2 Invitation Envelopes (4 3/8 x 5 3/4) - Neenah Paper Classic Linen in 70lb. Avon Brilliant White are bright white, versatile envelopes with a woven linen texture. This envelope has a stylish square back flap, and is perfect for invitations, greeting cards, thank you cards, and is ideal for letters as it's designed to fit quarter-folded sheets of paper. Since the A2 envelope fits inside all larger "A" envelope sizes it's commonly used as an RSVP and return envelope, as 4 1/4 x 5 1/2 flat and folded cards fit inside. This A2 size envelope is easily sealed by a moistenable glue strip located on the back flap.