High-quality grid paper: 80 sheets of FSC-certified, light cream-colored paper with a weight of 140 g/m², ideal for optimal readability and suitable for various writing instruments, without bleed-through. Versatile use: 5 mm square grid paper, perfect for mathematical calculations, diagrams, technical sketches, and design ideas, helps with symmetry and scale proportions. Durable design: sturdy hardcover in Japanese Kerria with rounded corners, offering protection and stability, ideal for on-the-go or heavy daily use. Useful extras: elastic closure prevents unwanted opening, integrated ribbon marker for quick access to notes, and an expandable envelope for loose notes or cards. Reliable quality: Sakura is known for premium paper products, carefully designed for creatives, students, and professionals who value durability and functionality.