SuperLock Heavy Duty Interlocking Rubber Flooring Mats - Six Pieces Mat Dimensions: 19.5in L x 19.5in W x 0.38in H / Weight: 5.5 lbs Jigsaw Puzzle Style Mat Ideal for Fitness Rooms, Laundry Rooms, Utility Rooms, Rec Rooms, and Dog Kennels Protects and Insulates Floors with its Exclusive Interlock System/ No Messy Adhesive or Tape Needed and Installs in Minutes Virtually Seamless: Trim With a Sharp Utility Knife and Clean With a Damp Mop Reduces Noise/ Anti-Fatigue