Learn Italian: Vendiamo la fodera a cinque euro al pezzo. - We sell the lining at five euros per piece.

The first a marks the price point, translating well to selling something at five euros. The second a is combined with the definite article il to create al, which acts as the distributive marker meaning per piece. Both are key uses of the preposition a when dealing with commerce and rates.

Could we use per pezzo instead of al pezzo?

While you might see per pezzo occasionally, using a combined with the definite article is the most natural and standard way to express rates in Italian. You will constantly see forms like al chilo for per kilo, al litro for per liter, or al pezzo for per piece in shops.

Shouldn't it be cinque euri since it is plural?

No, the word euro is invariable in Italian, meaning it does not change its ending in the plural. Whether it is one or one million, it is always euro.

What kind of lining does fodera refer to?

The word fodera usually refers to the inner lining of a piece of clothing, like a jacket or a skirt. In other contexts, it can also refer to a removable fabric cover for furniture or cushions.