Enlarge fonts in Contacts ?

I have reached an age at which the print in many applications needs much enlarging if I am to be able to read it. A particular offender is Contacts. I cannot tell you which version I am using, because in About Contacts, the type-face is tiny.

I have downloaded TinkerTools, and that has done a good job of enlarging the type-face in the Google Chrome menu-bar, but I cannot get it to enlarge the type-face in Contacts.

Is there a way around this ?