Heavyweight 65 lb. acid free cover. Perfect for greeting cards, postcards, report covers, rubber stamping, memory books, flyers, announcements and more. Lignin free, buffered. Laser and inkjet printer compatible. Acid-free and recyclable. Each pack includes 40 sheets. Each sheet measures 8-1/2" x 11". Sold as 3 packs for a total of 120 sheets.