FIESTA

I finished plying this skein. It is a real FIESTA.
It is 90+ yards, about 6 wpi, 150+ gram/7+oz, 7/8 mm needles

Europe and the US differ in determining what yarn to use for a project. In Europe it is based on needlesize and yarnweight. In the US it is yardage. I think...can anyone explain it better?