Add elegant style to your invitations and announcements with these versatile envelopes Ideal for sending 4in. x 6in. or smaller photos, social announcements and invitations. Fits inside envelope sizes A7, A8, A9 and A10 for use as an inner envelope. Square flap adds stately style to your invitations and announcements. Made of 92-lb paper. Moisture-activated glue closure creates a secure seal. LUX Invitation Envelopes, A6, 4 3/4in. x 6 1/2in., Black Satin, Pack Of 1,000 is one of many Lined & Invitation Envelopes available through Office Depot. Made by LUX.