Amazon.com : SCZS Floor Sign Stand Adjustable Pedestal Sign Holder Stand, Poster Stand Aluminum Snap Open Frame for 11x17 Inches with Heavy Round Base, Both Vertical and Horizontal Sign Displayed (11x17inches (Black,2Pack)) :
M&T Displays Free Standing Display Stand with 1 x (11X17) snap Frame in Portrait/Landscape and (2) 2 x (8.5x11) Clear Shelves Acrylic, Single Sided (Black) - Walmart.com