Shoe size technical specification from International Standards Organisation. It contains three conversion tables (for adults and children) which feature major shoe sizing systems (e.g., Mondopoint, United States, European, United Kingdom, China, and Japan). Each table is based on actual foot length measurement (insole) in millimeters; typical last length ranges are also included. The standard includes conversion tables for Mondopoint (USSR/Russian/Chinese/Japanese/Korean systems) using length steps of 5 mm and 7.5 mm, European Paris point system, and UK 1/3 inch system. The standard has also been adopted as Russian GOST R 57425-2017. The standard is maintained by ISO/TC 137, which also developed ISO/TS 19408:2015
ISO standards for trailer connectors the 7-pin or 5-pin connector, but these are rare today. Note that the heavy trucks that may have 12V systems are usually older (Vintage vehicles) or on non-European markets. The color coding is defined in ISO 4141-3, but the standard color codes are not always followed and may be different on your particular vehicle. Physical design of the standard ISO 11446 but also called Jaeger-connector from the company that developed it. The following supplementary information exists for the connector: Other variants of this connector exists but they are rare.<ref name="JAEGER 13P/24V similar to ISO 11446"></ref> One is used in 24V