TODAY IS THE DAY YOU CONQUER THE CHAOS Organize, categorize, sort, plan and delegate - Tiles are a nesting, dry-erase organizational system. M.C. Squares Tiles have rare-earth magnets on the back so they mount to any magnetic surface, including file cabinets, equipment, magnetic whiteboards, and most refrigerators. Whether you're planning your next big project, categorizing your production processes, organizing your home, or just need the space to think and create, M.C. Squares Tiles are the ultimate solution. Add tasks and ideas, sort and categorize, get things done “...A stack of small and larger tiles are a worthy addition to one's desk” - Tech Republic The Details: Header Tiles measure 2.25” x 11.25” Column Tiles measure 11.25” x 34” Large Tiles measure 11.25” x 11.25” Mini Tiles measure 5.5” x 5.5” Rare-earth magnets on the back hold tiles on any ferrous surface Not safe for children under 3 Manufactured with our exclusive Gorilla Board rigid whiteboard technology Love them or return them for 90 days Large Tiles measure 11.25" x 11.25" Mini Tiles measure 5.5" x 5.5" Header Tiles measure 2.25" x 11.25" Column Tiles measure 11.25" x 34" Rare-earth magnets on the back hold tiles on any ferrous surface Not safe for children under 3 Manufactured with our exclusive Gorilla Board rigid whiteboard technology 2 year replacement details are in the box