The Merlin Eraser Sponge is chemical-free and only requires water to remove tough dirt, grime, stains, pencil, marker and crayon from surfaces such as: walls, appliances, bathroom fixtures, and other hard smooth surfaces. Melamine cleaning surface of both sides. Yellow gripping in the middle prolongs use and improves performance. Fits comfortably in hand. Larger size lasts longer. Dimensions: 4.5"x 3.0" x 1.5".