12x18 inch Strathmore 400 Series Drawing Pad 24 Sheets. The 400 series drawing paper 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, wirebound 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.