Composition Cork is also known as bulletin board cork We offer composition cork in four different thicknesses. 1/16", 1/8", 3/16" and 1/4",   1/4" is our suggested size for a durable bulletin board. Composition cork comes on a roll 4 ft. wide.  Burcor sells composition cork by the square foot. Burcor, Inc. of South County P.O. Box 350 4564 North Square Dr. High Ridge, MO. 63049 636-376-8305 FAX:636-376-8324