Marking knives can be measured by their overall length, blade length, width and thickness. Below is the range of sizes that both single-bevel and double-bevel marking knives are available in.
The overall lengths for marking knives range from 105mm (4″) to 210mm (7″).
Blade lengths start at 35mm (1 3/8″) and go up to 58mm (2 1/4″).
Blade widths range from 8 mm (5/16″) to 20mm (3/4″).
Marking knives are available with a blade thickness from 0.5mm (0.020″) to 3mm (0.125″).