Over-sized Navigation Buttons

Hi,

Somehow I’ve managed to enlarged ‘next post’ & ‘previous post’ text and now I can’t work out how to make it small again. I’ve gone through and searched for any larger than normal font-sizes but nothing has worked.

Any ideas on how to fix this?

If you scroll to the bottom of my site you’ll see what I mean https://collectivelyme.net/

Thanks,
Mardi