Cohas Adhesive Backed Blackboard includes White Liquid Chalk Marker, 16 x 24 Inches, Removable Adhesive Adhesive backed chalkboards are perfect for leaving notes and turning surfaces into magnet board Featuring a chalkboard-like surface, they can be hung anywhere and repositioned up to 20 times Includes white wet-wipe marker with a chisel 6mm tip that makes thin and thick 1/8-inch lines Rectangle magnetic boards measure 16 by 24 inches; use portrait or landscape; can be cut to size Use the included liquid chalk marker, or use with real chalk; do not use dust free or dustless chalk