Elmer's® Corrugated Tri-Fold Display Board 4 Ply Single 36"X48" Sturdy corrugated display board is tri-fold and stands up by itself. Size is 36"x48" open and 36"x24" closed. Perfect for science fairs, school projects, and business presentations. White or color inside/Natural kraft outside-1 ply. Smooth surface is perfect for paints, markers, glue, and other embellishments. 100% recyclable.