Sturdy Alvin architectural chipboard is an ideal base for mounting architectural models. Features a smooth, brown finish. Architectural chipboard is a popular surface for creating memory books, embellishments like die-cuts, lettering borders, and frames for scrapbooks. Available in 3 thicknesses (as shown below) to allow for various elevations: single-weight, double-weight, and triple-weight. Each chipboard sheet measures 30" x 40".