These alcohol marker pads are bleed proof and dimensionally stable designed for an optimum performance of COPIC Markers. The layout paper in these alcohol-marker pads is so thin that you can trace images through each sheet. Yet, a special coating on the reverse side keeps colors from bleeding through and keeps images clear and sharp. Thin, bleed-resistant layout paper 8.25" x 11.69" Paper weight: 70 gsm 50 sheets per pad Created for architects and designers, this paper is perfect for layouts and renderings.