100% Cotton Brilliant White 8-1/2-x-11 Cardstock Paper 25-pk - 320 GSM (118lb Cover) PaperPapers Letter size Card Stock Paper - Business, Card Making, Designers, Letterpress and DIY Projects Color name: Savoy Brilliant White 100% Pure Cotton Paper size: 8.5-x-11-inches (216X279) / Letter Size Paper basis weight: 320 GSM (118lb Cover) - thick cardstock paper.