Hi there,
Hooks don’t work like that – think of them literally as a hook that you hang something on – so you have to style the thing you add to them π
Edit your Hook and wrap your HTML in <small></small>
tags like so:
<small>This post may contain affiliate links, for more information see my affiliate disclosure <a href="https://earningonlinewithme.com/affiliate-disclosure">here</a>.</small>
It will make the font 75% smaller then the standard body text.