9 x 12 inch Strathmore 400 Series Medium Drawing Paper Pad Spiral 24 Sheets. Strathmore 400 is one of the most versatile sheets Strathmore offers. This cream-colored drawing paper with a smooth, non-reflective surface is ideal for line drawing and technical detail work, as well as sketching and finished work. Each pad contains 24 sheets of 80 lb (130 gsm) paper, wire bound on the short side. The true size sheets are micro-perforated, allowing access to the entire sheet and the ability to remove the sheets cleanly. A heavyweight, acid-free, natural white paper that is ideal for illustration and final drawings. The perfect surface for any dry media; suitable for pen and ink. 80lb weight.