Helix Grid Vellum Paper Pads are ideal for tracing and creating technical drawings and blueprints. Each pad contains 50 lightweight, acid-free sheets featuring a non-reproducible blue grid that makes it easy to scale drawings up or down. Made from 100% cotton rag fiber, sheets are tear-resistant and offer medium transparency. They boast a smooth finish which accepts graphite and pen-and-ink well. - Helix Grid Vellum Paper Pad - 10 x 10, 8-1/2" x 11"Helix Vellum Paper, 10 X 10 GRID 8.5 X11 -