Portable Retractable Volleyball Whiteboard This version is perfect for Volleyball coaches to diagram plays during the game or drills during practices. Dimensions: 17 long x 12 high x 2-1/8 deep (open); 3-1/8 long x 12 high x 2-1/8 deep (retracted) Each Zipboard comes with 1 Beltclip, 2 Strap Hooks, 1 Dry Erase Marker, and 1 Dry Erase Eraser. Shoulder strap not included. See also our other versions of Zipboard ideally suited for Basketball, Football, Soccer, Volleyball, Lacrosse, Hockey, and plain whiteboard