Listing is for 20 yes 20 sheets of  3M  Brand Resin Bond Cloth backed Aluminum Oxide sanding sheets size 4- 1/4 X  6 inch -great  for 1/4 sheet size Palm Sanders. This in NOT Sand Paper it IS Cloth back sheets -will last 5-10 times longer -especially on rough surfaces -less likely to tear -like paper does 20 sheets weigh