The libra (often translated as pound) was a pre-metric unit of mass or weight in Spain, and was carried to the Spanish colonies and used there. The standard value of the libra was considered to be the libra of Avila or Castilla, at 460 g (1.01 lb); however, a number of other values were used in the various provinces of Spain: In Aragón, Baleares, Catalonia, and Valencia, the libra was divided into 12 onzas (usually rendered as ounces), while in the Basque provinces it was divided into 17, and in Galicia, into 20.