Pacon Cardstock Sheets - White - Letter - 8 1/2" x 11" - 65 lb Basis Weight - 100 / Pack - Sustainable Forestry Initiative (SFI) - White Heavyweight, 65 lb. cardstock paper is perfect for greeting cards, postcards, report covers, rubber stamping, memory books, flyers and announcements. Cardstock works well in and inkjet printers. Paper is acid-free, lignin-free and buffered.