Joint European standard for size labelling of clothes
The joint European standard for size labelling of clothes, formally known as the EN 13402 Size designation of clothes, is a European standard for labelling clothes sizes. The standard is based on body dimensions measured in centimetres and its aim is to make it easier for people to find clothes in sizes that fit them.
Source: Wikipedia — Joint European standard for size labelling of clothes (CC BY-SA 4.0)