Units from the metric system can be used to describe the mass, volume or length of an object. Mass is measured in grams (g) and kilograms (kg). Volume is measured in millilitres (ml) and litres (l).
Male, brown hair, blue and white striped top: Feet and inches. Male, black hair and goatee, blue and white striped top: Pounds and ounces. Male, grey curly hair, checked top: Centimetres, millimetres.