what size lead would a wooden pencil have?
Probably the most popular grade among artists is 2B. The standard wooden artists' pencil is 7 inches long with a lead 2 mm in diameter. Two millimeter leads are also used in lead holders, popular with draftsmen. The point on a 2 mm lead in a lead holder is made with sandpaper or a lead pointer, but leads that do not require sharpening are made in diameters of 0.3, 0.5, 0.7 and 0.9 mm for draftsmen's mechanical pencils. A close relative of the artists' pencil is the graphite crayon, made in diameters of 7, 8 and 12 mm.