These chart holders have no sides so as to accommodate a variety of lengths of charts. They are available in either 1/4″ clear acrylic, or either 3/16″ clear or colored acrylic, 3/16″ white or black ABS, or in 1/8″ black ABS. They measure 15.5″ wide X 9″ tall in the front, 11″ tall in the back and 1″ deep. Please contact us for pricing if you wish to order in quantities over 24. Shipping is included in the price of all of our chart holders.