5" x 7" Single Flat Cards work great as announcements, invitations, or postcards. These 5" x 7" flat cards measure 5" x 7" and contain no folds, scores, or perforations. This 5" x 7" Flat Card is made from an 8 Mil (195 gsm) White Inkjet Gloss cardstock that is optimized for HP Inkjet Printers but works great on almost any inkjet printer brand. Inkjet printer compatible only! This stock is glossy on one side and matte on the other. Both sides are printable!Note: If mailed as a postcard, this size would require extra postage.