Trying to figure out what size to order in a T shirt. Is "international medium" basically US medium?

I'm reading the measurement chart and here's the puzzle. For Medium, bust is 18.5-19.3....um, whats? That can't be either inches or centimeters! Waist is 27-28, that sounds like inches. And hip is 35.8-37...that seems like inches too.

That bust measurement has got to be off! 18-27-35 would be one difficult to fit woman for sure!