In file size certainly, yes.
Vim’s size can vary considerably based on how it’s compiled. A minimal build might be a few hundred kilobytes, while a full-featured build with a GUI might be several megabytes. The CLI version is a bit smaller than micro though.
Micro is a relatively newer editor compared to Vim and Nano. Its binary, which includes all its dependencies, is larger than Nano but smaller than a fully-featured Vim. It’s typically around 15-20 MB.
Nano is lightweight and typically comes pre-installed on many Linux distributions. The binary size is usually less than 1 MB.