[Tex/LaTex] Using extsizes package changes the page margin

Question

My thesis documentation rules state that the page margins should be:

left=4cm, and the remaining are 2.5cm

I have done that using geometry package, but when adding the extsizes package to change the font size to 14pt the margins are changed.

How can I add font 14pt without changing the margins.

Answer 1

Package extsizes not only changes the fontsize, but also amends various skips as well as the margins. Changing the page geometry after loading the package will give fixed margins.