When the seamstress was making your uniform she had to measure your length, waist, chest, and hips; she also had to measure the cloth, elastic bands, and zips. She measure using a metre ruler.
There are many professions that need to measure things in such a way: such as builders, surveyors, carpenters, architects, engineers,etc. Some work with measurement that take long distances – cartographers measure long distances such as roads, and distances between towns, countries, etc. They would most likely use the kilometres (km).