Knowledge of pencils
The length and thickness of the pencil
The length is about 172mm or more in JIS standard, and the Tombow Pencil is based on 176 ± 0.8 mm and 2 cut, 174 ± 0.8 mm.
The first person to decide the length closest to this is Germany Luther Farber. It proposes to “7 inches (17.78 cm)” around 1840. This length is said to have taken the length from the place of the adult hand to the tip of the middle finger.
The thickness is the maximum diameter of 8mm or less in JIS standard, and 7.7 ± 0.2 mm by the standard of the Tombow Pencil .
