The original silicone trivet and potholder features rows of raised, round "bumps" for added gription when handling hot pots and pans, and for increased heat dispersion when used a trivet. The soft, flexible silicone insulates your hands while providing a secure grip and is nearly impervious to heat and stains. Just throw Hot Spots in the dishwasher for clean up. Small Hot Spots are 7" square, the large Hot Spots are 11.5" per side.