The QEP Extra Large Multipurpose Sponge is designed to withstand heavy duty cleanup, making it the best sponge for grout cleanup during tile installation. This sponge is absorbent, quickly washes out grout and features rounded corners to prevent digging out or marring grout. This sponge is also great for general purpose cleaning and washing cars and boats. Sponge measures 7.5″ x 5.5″ x 1.875″.