MasterChinese Chinese Calligraphy Mat Sumi Drawing Painting Felt Desk Pad 31x47 inches (80x120cm) Good quality. Thickness: 3mm (about .12") Put this unit under your paper when doing calligraphy or drawing. Non-washable (you could, but better not) 31x47 inches (80x120cm). Weight: around 350g (0.7 lbs).