Office Depot(R) Inkjet Paper, 8 1/2in. x 11in., 24 Lb., 108 Brightness, Ream Of 500 Sheets Machine Compatibility - Laser printer, color copier Paper Color - Brilliant White Paper Type - Ultra Premium Laser Paper/acid-free, archival quality Sheet Size - 8-1/2 x 11 Substance Weight - 24-lb.