Ampad Quadrille Pad with 8 Squares per Inch, Letter Size, White, 50 Sheets per Pad (22-005) Letter; White Graph Pads: 10 pads per bloc Quad Ruled - 8 square/inch SFI Certified Graph Pads are designed for drafting, plotting and scale drawings. Glue top binding with heavyweight 20lb. Paper. 50 Sheets.