Heavyweight White Smooth Cover Stock - 110lb. / 297 gsm - Size 12" X 18" - 50 Per Pack Made from 110lb Cover (297 gsm) Works on Inkjet & Laser Printers compatible Very Thick Cardstock perfect for invitations, post cards, covers, and more This stock is very Thick Cover Stock Make Sure your printer Can handle this weight Paper 110lb Cover (297gsm) cardstock