The term 'small weight' can refer to a variety of measurements, including OUNCE (5 letters), GRAM (4 letters), DRAM (4 letters), CARAT (5 letters), and MILLIGRAM (9 letters). An OUNCE is a unit of mass in the imperial system, equal to one sixteenth of a pound. A GRAM is a metric unit of mass, equal to one thousandth of a kilogram. A DRAM is an old unit of mass, equal to one eighth of an OUNCE. A CARAT is a unit of mass used for measuring gemstones, equal to two hundred milligrams. Finally, a milligram is a metric unit of mass, equal to one thousandth of a GRAM.