For the most demanding applications—Exact® Index Card Stock is the backbone of every business and classroom. It features a uniform, smooth surface that's durable enough to take on the toughest jobs, and it holds up to frequent handling and the rigors of postal machines. Sheet/Roll Size: 8.5 x 11; Paper Basis Weight (lb): 90 lb; Paper Grade (gsm): 243.72 gsm; Paper/Media Color(s): Ivory.