Niji Artist Crayons are creamy, highly pigmented, artist-quality crayons that offer excellent coverage on virtually any surface. Perfect for artists of every age and ability level, draw and design on anything from paper and glass to ceramic, metal, and even rocks! Each set of vibrant, non-toxic colors comes with a clear bonus crayon that is intended for blending but works equally well for resist techniques. These round stick crayons measure 3 1/4" long and 7/8" thick.