Lyra graphite crayons make sketching and background shading easier and more fun. These are non water-soluble graphite crayons that are ideal for artists who take care over shading. They are paper wrapped to keep hands clean. The smooth graphite glides easily across the paper. Hexagonal in shape, these large graphite crayons are 12mm in size. Set includes 24 graphite crayons, 8 each of #2B, #6B, and #9B. AP certified, non-toxic.