It’s quite funny how easy this was but how long it took me to figure this out so I just thought I’d throw this online in case anyone is as dumb as me.
Hopefully it helps someone and if it does, don’t tell anyone. 
Within Nautilus (your file browser) click the 4 square icon thing
(THIS)
Then, slide the left-right dial thing (don’t worry about what is selected in the radio dial)
Yes. It was really that easy…
omggg, I’ve been having this problem for a year now, I couldn’t find a way to have icons back to normal they were MASSIVE.
Thank you SO MUCH !!
Please no img
i am surprise it is so easy