Satellites come in all sizes and shapes. A small satellite or SmallSat is commonly considered to be a satellite that weighs less than 500 kg.

As a basic application of various satellite sizes by mass, the common distinction:

Lower Limit	Upper Limit(kg)	Classification	Examples
1000		Large satellites	Hubble Space Telescope / Inmarsat-4A F4
500	1000	Medium satellites	O3b
0	500	Small satellites	SpaceX StarLink

CubeSats are smaller yet.