OK...I have a 1953 cape Cod, all orignial outlets and switches.

I have purchased new wall switches, installed and am having trouble with purchasing new faceplates...They don't match the holes in the electrical junction boxes already in the wall. The distance between the superior and inferior holes in the junction box is 3 1/4 inch...asll the new switches and faceplates are 3 3/4... Am I missing something? I can attach thw switch becasue there are variable holes in them, but faceplates I can not.