Our Sponge Set for Watercolor Paint is a great help for people who like to paint with watercolors on wet paper. The paper is put in water for a minute. Then when it is taken out, you gently wipe the wet paper with the firm edge of this viscose sponge. The paper will be ready for watercolor painting, just like in the Waldorf preschools and kindergartens. The sponge measures 3" x 4" x 1 1/2". You will receive 2 sponges. Made in the USA.