One 500-sheet pack of paper for a copy machine or a printer
[DOC] [TLE] Staples Copy Paper, 8 1/2" x 11", 500/Ream (135855/135855WH ... [PAR] Staples Copy paper is ideal for white/black toner-based copiers, plain-paper fax 
... measuring 8 1/2"x 11" provides archive safe, sold as 500 sheets per ream.