Does Runeterra Use a different unit of measurement, or use different names? (Q2 of 5)

My reason for wondering is that I'm writing a story and want accurate information if it can be found if it can't then I'll just use standard measurement scales.

• This thought came about due to measuring anchor weight and size comparison to ships. As there is a ship in my story that the crew is traveling to repair. I won't share too much, but accurate measurements in the universes measurements feels like it would fit better.

There's also the fact that I feel this is important information.