Stillman & Birn Delta softcover sketchbooks are flexible, yet strong with sewn bindings and are finished with rounded corners to prevent the edges from fraying. Ivory, extra-heavy weight 270gsm paper has a cold-press surface that is suitable for all dry media and ink. The paper also has internal and surface sizing, allowing it to accept light washes, wet media, and watercolor as well. Paper is pH neutral, lignin and chloride free.Sketchbook measures 5.5 x 8.5 inches, with 28 sheets and a dark green cover. EXTRA HEAVYWEIGHT PAPER: Stands up to advanced dry & wet media techniques. Great for working in heavier washes or overlaying washes (glazing) of watercolor or gouache. CRAFTED FOR MIXED MEDIA: Double-sized (from non-animal materials) for enhanced wet strength and glowing color. ERASABLE & TOUGH: Accepts multiple erasures of dry media and lifting of wet media. DURABLE: Premium U.S. sewn binding, deluxe covers and heavy-duty art paper equals a sketchbook that is built for serious use. PREMIUM QUALITY: Exceptional features make Stillman & Birn the popular sketchbook choice, cherished by artists of all levels. UPC 851177003802 ASIN B017RT49AS Color Ivory Brand Name Stillman & Birn Paper Size 5.5 x 8.5 inches Unit Count 1.0 Count Item Weight 0.23 Kilograms Sheet Count 28 Manufacturer Stillman & Birn Paper Finish Watercolor Material Type Paper Item Dimensions L x W 8.5 L x 5.5 W Recommended Uses For Product drawing with dry media, ink, and painting with wet media and watercolor