Help extend your reading sessions with the ease of using our thumb holder to keep the pages open wide! Simply use your thumb in the center hole and place it between the open pages to easily keep the book open without extended strain to your hand. The rounded edges help to prevent damaging the pages and spine from creasing or pulling the glue point apart. Back of holder has Vivid Valley Laser Designs LLC logo. Dimensions: Width: 2.35" Height: 1.38" Thickness: Approximately 0.24" Hole Circumference: 0.86" Materials: 1/4" MDF core plywood with either Maple or Cherry hardwood that has a protective finish applied.