This 10-pack of letter size corrugated cardboard sheets is perfect for a wide range of DIY projects, including bookbinding, crafts, and more. Key Features: - Sturdy & Supportive: 1.5 mm thickness provides excellent rigidity and support for your projects. - Versatile: Ideal for book covers, box making, model building, and other creative endeavors. - Easy to Work With: Easily cut, score, and shape to fit your unique designs. - Letter Size: Convenient 8.5 x 11 inch sheets provide ample space for your creations.