What metric system is used in Portugal?
In Portugal, the basic unit of measurement is the metre. The International System of Units (SI), the standard metric system in use in the European Union, defines the seven fundamental units used (metre, kilogram, second, ampere, kelvin, mole, candela).

What sizes are used in Portugal ?
Portuguese sizes are in centimetres. Women's clothing sizes generally range from about 38 to 56, men's sizes from about 42 to 60. Adult shoe sizes generally go from about 35 to 46.