  We analyse the resonance conditions of a long and narrow ribbon of finite
length whether it is conductive or dielectric. This is accomplished by using a
full wave approach based on the material independent modes that naturally
discriminates the role of the geometry and of the material. This method
effectively allows the design of the material in such a way to obtain the
desired resonances. Eventually, as an example, we design two quasi-one
dimensional resonators based on a graphene layer and on a silicon thin film.
