Material: Stacking office trays made of durable acrylic, crystal clear, strong and durable, no discoloration. The surface is polished and the corners are chamfered . You'll love every detail. Desktop Organizer Dimensions: Each piece of this stackable desktop organizer measures 12L x 9.26W x 2.76H inches,Fits 8 x 5inches paper size. Space Saving：Easily stack multiple tray ,nicely increased the desktop's vertical storage space.Each tray has a stall bar underneath, won't slip off easily, good stability, keep your desk accessories and files neat and organized. Desk Organizers and Accessories：Unique style, fine detail, and craftsmanship, SANRUI Desk Organizer pays attention to every detail. Transparent appearance makes it easy to find your documents, great for classroom , office or home office organization, business data files, etc Acrylic Paper Organizer: set of 2 vertical stackable file trays. Can be used individually or stacked. Easily add layers up to 6 to maximize space. No Assembly Required: Simply unpack the document holders and stack or separate them as desired. You'll love every detail.