There are generally three sensor sizes for current digital SLR cameras:
Full size: 35mm horizontally
APS-C: 23.4mm horizontally
Micro Four Thirds: 17.3mm horizontally
However, these standards are not strictly defined, and manufacturers may have different names and slight differences in actual size.
A large sensor has the following advantages:
Your field of vision will expand. For example, when attaching a microscope lens (NDPL-1), a larger sensor provides a more natural field of view.
Even with the same number of pixels, the dynamic range is expanded.