Learn Italian: Questa lana costa novanta euro a pezza. - This wool costs ninety euros per bolt.

In Italian, the preposition a is the standard way to express rates, prices, and distribution. While you might occasionally hear per in specific contexts, a is the most natural choice when stating the price of goods per unit of measurement, just like a chilo (per kilo) or a litro (per liter).

Why is there no article before pezza? Shouldn't it be alla pezza or a una pezza?

When using a to indicate a rate or price per unit of measurement, the definite or indefinite article is generally omitted. You use the simple preposition directly followed by the singular noun, resulting in expressions like a pezza, a persona (per person), or a mese (per month).

What is the difference between pezza and pezzo?

While pezzo means "piece" in a broad, general sense (like a piece of cake or a piece of wood), the feminine noun pezza specifically refers to textiles. It can mean a patch used for mending clothes, a rag, or—as in this sentence—an entire uncut bolt or roll of fabric.

Why is it novanta euro and not novanta euri?

The word euro is invariable in Italian. Whether you are talking about one euro or ninety euros, the ending does not change to reflect the plural.