Avery White Inkjet Print-to-the-Edge Postcards Box Of 100, create invitations, announcements and reminders using inkjet printers. Heavyweight, letter-size cardstock feeds automatically from your paper tray. Ultra-fine perforations let cards separate easily and cleanly. Thick, sturdy cardstock holds up during travel through the mail. Avery offers many easy-to-use templates for Microsoft Word and other popular software programs. Weight meets federal postal standards.