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. Hot Spots measure 11.5" square.