Colorfin PP61100 Sofft Art Sponges, Assorted, 4-Pack Art sponges comes in assorted shapes They are reusable and feature micropore technology Use them with panpastels, water-based colors, polymer clays and ceramics to create unique techniques and effects Just load the sponge with color and gently apply to the surface Measures 2-inch length by 1-inch width by 1/2-inch height