About this item:
Slotted header boards attach easily and securly for prime, attention grabbing display. Made of the same sturdy corrugated fiberboard stock as the corruguated project boards. Smooth, opaque white surface has a matte finish and easily accepts markers, crayons, paints and adhesives. Fits our 18" x 48", 24" x 48" and 36" x 48" project board.
 
Header boards. Set of 24. 
Measures 10" x 36"