These aerobic floor tiles will lock together tightly and easily. When interlocked, the tiles will stay put and lay flat. Most importantly, they will provide the anti-fatigue cushion needed for your aerobics customers and instructors. These aerobic tiles measure 40x40 inches. This larger tile size reduces the number of seams in your floor vs a smaller 2x2 ft tile. The 3/8 inch thickness provides all the support and cushion needed for aerobic, step, and dance movement even when placed directly over a hard floor such as concrete. This aerobic floor tile has an interlocking design which makes installation as easy as laying the tiles down and piecing them together. Because no glue is required, these tiles are an excellent choice for temporary or non-permanent installations. Shipped cost presented by Google Shopping is estimated, please check our website for real time shipping costs.