Single Flat Cards are great to use as announcements, invitations, or postcards. These large single flat cards measure 5 1/2″ x 8 1/2″ and contain no folds, scores, or perforations. This product is made from a 80lb Cover (218 gsm) Black cardstock and is inkjet & laser printer compatible.Note: If mailed as a postcard, this size would require extra postage.