No, I'm referring to the file size of sc_selmap.pac itself; its file size on the ISO is 1,214,283 bytes (approx. 1.16 MB). Basically, before saving the file, you want to check that the main archive's compression setting is set to LZ77.
Oh how I can do that, I'm using a wineskin version of Brawl Box since I don't have a laptop or a windows computer to access brawl box fully or whatever I need to do to get this on it's format.