For the most demanding applicationsExact 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): 110 lb; Paper Grade (gsm): 199 gsm; Paper/Media Color(s): White.