Lettermark Lettermark Colors Index - 96 Brightness - 98% Opacity - Letter - 8 1/2" (215.90 mm) x 11" (279.40 mm) - 90 lb (40823.31 g) Basis Weight - 163 g/m² Grammage - Smooth - Sustainable Forestry Initiative (SFI) - Acid-free, Chlorine-free - Brite White - 250 Sheets per Ream - 2000 / Carton