Avery® Half-fold Greeting Cards - 97 Brightness - 8 1/2" x 5 1/2" - Matte - 30 / Box - Perforated, Heavyweight, Rounded Corner - White Custom design professional-looking note cards using your printer. Ideal for creating Thank You Cards, announcements, invitations and more. Ultra-fine perforations allow you to separate cards easily and cleanly. Heavyweight cardstock sheets feed automatically from your inkjet printer's paper tray. Note cards include coordinating envelopes. Free, easy-to-use templates for Microsoft Word and other popular software programs are available online.