Do they measure boards in centimeters in the rest of the world?
No but don't believe all the hype around the metric system either, we really measure everything in boards which is the common standard here: 'this street gap is four boards long', 'I need a board-and-a-half high desk for my office', etc... Centimeters are for kooks, but whenever communication is needed the most practical reference point is 1 brd (board) = 80 cm aka. the required minimum in high ollie zones.
Same shit as Fahrenheit vs. Celsius, we actually measure that shit in heat here, don't get fooled.