Many people will expect the rain drop size should be as follows:

In fact, the actual shape of the rain drop size depends on the following factors: Surface tension forces of the rain drop Surface tension forces of the rain drop Pressure of the rain drop Pressure of the rain drop Rainfall intensity Rainfall intensity Air turbulence Air turbulence Wind Wind

Therefore, the actual rain drop size should be a bun-liked shape

On average, the diameter of a rain drop is in between 0.1 – 5 millimeters. 0.5 mm 0.5 mm 1mm 1mm 1.5mm 1.5mm 2mm 2mm