How thick is the graphite in a regular number two pencil?

The "lead" in a regular number two pencil is made of a mixture of graphite and clay, typically about 1.5 to 2 millimeters in diameter. The actual thickness of the graphite core can vary slightly depending on the brand and manufacturing process, but it generally falls within this range. The core is encased in wood, providing the pencil's structure and allowing for easy sharpening.