in millimetres by adding an allowance of two shoe sizes: where L is foot length in millimetres. Direct conversion between adult UK, Continental European and Mondopoint shoe size systems is derived as follows: Using these formulas, the standard derives shoe size tables for adults and children, based on actual foot length measurement (insole) in millimetres. Typical last length ranges are also included (13 to 25 mm over foot length for adults, 8% greater than foot length plus 6 mm for children). Exact foot lengths may contain repeating decimals because the formulas include division by 3; in practice, approximate interval steps of 6.67 mm and 8.47 mm are used, and sizes are rounded to either the nearest half size or closest matching Mondopoint size. Size marking It is recommended to include size marking in each of the four sizing systems on the shoe label and on the package. The principal system used for manufacturing the shoe needs to be placed first and emphasized with a boldface. The standard includes quick conversion tables for adult shoe size marking; they provide matching sizes for shoes marked in Mondopoint, European, and UK systems. Converted values are rounded to a larger shoe size to increase comfort. See also List of shoe styles Shoes Clothing sizes References External links IS 8751-1 (1978): Footwear sizes in mondopoint system, Part 1: Fundamental characteristics IS 8751-2 (1978): Footwear sizes in mondopoint system, Part 2: Length grading Chart of US shoe widths by size Anthropometry Footwear Sizes in clothing