Use this clear overlay to make up your own designs using permanent marker pens. Made from a tough semi-rigid plastic, these new overlays are long lasting and self-supporting, so that they can be propped up in front of any whiteboard or big book easel. They can also be hand-held or fastened to a wall. Compatible with the majority of whiteboard markers. Sized : 720 x 635mm Please Note: These Overlays should be stored flat. ALSO AVAILABLE: Easel (code 1a) and Table Top Whiteboard (code 300), with rear storage area for the overlays.