Share your favorite photos or send event invitations in style Ideal for sending 5in. x 7in. or smaller photos or event invitations. Fits inside envelope sizes A8, A9 and A10 for use as an inner envelope. Square flap looks stylish and sophisticated. Made of 70-lb paper. Peel-and-press closure provides a simple, secure closure. LUX Invitation Envelopes, A7, 5 1/4in. x 7 1/4in., Avocado Green, Pack Of 1,000 is one of many Lined & Invitation Envelopes available through Office Depot. Made by LUX.