As far as I know, there is no documented limit on the size of a module. It seems the Excel development community has settled on 64KB as the size where strange problems start happening. So, as a rule of thumb, if you have a large module, it may be advantageous to split it up into smaller ones.
To check the size of a module, export it to a text file and check that file’s size in Windows.
Hmmm, 2KB. I think I’ll be okay with this one.