6 different grit includes: 60, 80, 100, 120, 180, 220. Coarse, Medium, Fine... Sanding sponge Size: 4 x 2.8 x 1 inch. Grit printed on the sanding sponge, easy to distinguish and use, no need to put all the sand blocks together to compare, at a glance. Washable and reusable, can be used directly in water.