How do you solve the issue with an object with subdivision and multiple materials on it? I was making a charger and I have given it some subdivision as usual. Now one side of the charger has a bit different texture (less glossier to be specific) so I tried that in blender, but that material looks shrunk. 



I have faced this problem earlier also but that was an object with higher geometry. So I used inset and extrude tools to solve that. But here I cannot do that as it is only 1 large face. 

This is what my geometry looks like, with the face selected that I want to edit.



Any solutions?
I guess you have two solutions:


create 4 additional edge loops close to your first edges so that it forces your texture to stick to these edges


or


unwrap your object and use a black square as a factor in a mix shader