"These square plates are very expensive."

Translation: Ces assiettes carrées sont très chères.

[Yves991549]

as far as i know, in english "plates" can also be tranlated by "plats" !

[awittstrom]

In this sense of the word "plat" I think so. My dictionary says "Plat n. m. Pièce de vaisselle plus grande que l'assiette, dans laquelle on sert les aliments à table."