Craft and send your own handmade cards with these versatile envelopes Perfect for writing letters and sending greeting cards. Neatly accommodates a half-folded sheet of paper, so you can add a personal touch with handmade cards. Square flap adds a stylish, polished appearance. Made of 92-lb paper. Moisture-activated glue closure provides a reliable seal. LUX Invitation Envelopes, A9, 5 3/4in. x 8 3/4in., Silversand, Pack Of 500 is one of many Lined & Invitation Envelopes available through Office Depot. Made by LUX.