A standard number 2 pencil is about 7.5 inches long and about 7 millimetres in diameter. Most golf pencils and library pencils are about 3.5 inches long. Graphite is used most often to make the core of a pencil.
Romans and Egyptians used a stylus made of lead to write back in ancient times. In the 1500s, near Grey Knotts, England, a graphite deposit was found, and graphite started to be used as a writing material.
Simon and Lyndiana Bernacotti made the first modern pencil when they put a graphite stick inside juniper wood in 1560. Yellow paint has been used to cover most pencils in the U.S. since 1890.