This paper analyses the world demand for fibers using the system-wide approach with three dimension-product X space X time. We investigate to what extent differences in international consumption patterns of fibers can be explained by differences in incomes and prices faced by different consumers. A novel approach to cross-country consumption comparisons is employed to avoid the troublesome problem of what exchange rates to use when converting data into a common currency unit. We use data from the ten largest consuming countries to estimate demand systems and then examine how they perform in predicting consumption patterns in a large number of out-of-sample countries.