Heavyweight Solid Black Cardstock by Desktop Publishing Supplies is best uses as a backing mount for your photos or invitations. The solid black color also works great when using a gold or silver metallic marker. The stock is made from an 80lb Cover (216 gsm) Cardstock. This cardstock measures 8 1/2" x 11" and works with Inkjet or laser printers. This cardstock is heavyweight and may have trouble getting through some laser printers- please consult your printer manual before ordering.