Each citizen was given one pieza [2] for twenty-five pesos.
From this document it appears that the tonelada was reckoned at eight piezas; the pieza would then be estimated at ten arrobas, or two hundred and fifty libras.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "pieza" in a variety of sentences. We hope that you will now be able to make sentences using this word.