Brustro Toned Paper - Kraft Sketchbook, Wiro Bound, Size A4, 100GSM. (100 Sheets) 200 PagesA4 size, 21 x 29. 7 cm, 100 gsm Perforated and wiro bound Sketch book , Acid free papers and archival For Dry media like Graphite Charcoal Chalk Fineliners Pastels Colour pencils and Gel pens ochre in colour. The strong colour makes for an interesting background. Thanks to the spiral binding, the rugged cover can be fully opened to provide a sturdy base whilst on location. The sketch book paper won't react with your supplies and won't yellow over time