These tri-fold cards feature a cutout window which accommodates either a 3½" x 5" or a 4" x 6" photo (38" X 4s" opening). Simply insert photo or artwork at the folded edge of the card and personalize the frame. Double-stick adhesive tabs are included to secure the insert. Cards are 80 lb. cover measure 5" x 6d". Matching envelopes are 80 lb. text and measure 5¼" x 7¼". Acid-free.