EAC marking / EAC logo / EAC mark / EAC label / EAC sign EAC logo must be put only on those on products which are covered by EAC Certificate or EAC Declaration. EAC mark is a combination of three letters "E", "A" and "C" of equal height and width, which are written in one font. EAC logo size: EAC sign should be applied to a contrasting background (contrasting surface) and must be at least 5 mm of size.