LARGE-SCALE SIZE: 13x19 extra large portrait clipboard constructed with strong acrylic. Made for large-scale projects requiring ample workspace for super B / super tabloid paper size HOLDS UP TO 50 SHEETS: Easy to use ergonomic metal hinge clip holds up to 50 sheets firmly in place. The locking hinge clip is 11in long and positioned on the short side of the board RIGID SURFACE: Thick acrylic construction for rigidity and flatness. 14in x 21.5in size lets you work right to the edge of your super tabloid document without bending or warping ROUNDED EDGES: Rounded corners and edges add to safety, ergonomics, and durability. PROFESSIONAL: Made for architects, engineers, artists, and business professionals requiring a large-format clipboard for presentations, sketching, and document organization