There is no definitive answer to this question as it depends on the specific units of measurement being compared. However, in general, the largest unit of measurement is typically going to be the one that is used to measure the longest or widest objects, or those with the greatest capacity. For example, when measuring length, the largest unit of measurement is usually going to be the kilometer (km), which is used to measure very long distances. When measuring width or height, the largest unit of measurement is typically going to be the meter (m). And when measuring capacity or volume, the largest unit of measurement is usually going to be the liter (L).