If you know electronic components, you will know most of them are small and light, meanwhile they are powerful. Why do they so small?
An integrated circuit was made possible by experimental discoveries which showed that semiconductor devices could perform the functions of vacuum tubes and by mid-20th-century technology advancements in semiconductor device fabrication. The integration of large numbers of tiny transistors into a small chip was an enormous improvement over the manual assembly of circuits using electronic components. The integrated circuit's mass production capability, reliability, and building-block approach to circuit design ensured the rapid adoption of standardized ICs in place of designs using discrete transistors.
The two main advantages of ICs over discrete circuits are cost and performance. Because of the chips with all parts are printed as a unit by photolithography and not constructed as one transistor at a time, the cost is low. Furthermore, much less material is used to construct a circuit as a packaged IC die than as a discrete circuit. Performance is high since the components switch quickly and consume little power because the components are small and close together. As of 2006, chip areas range from a few square millimeters to around 350mm2, with up to 1 million transistors per mm2
There are many reasons why electronic components are so small, but the main reasons might be the cost and performance that refers above. For more information you can ask the electronic components suppliers for help and discuss with them. Hope it can be useful.