Learn Spanish (Spain): Buscamos diecinueve sillas pequeñas. - We are looking for nineteen small chairs.

In Spanish, the numbers 16 through 19 are written as a single word. To combine diez (ten) and nueve (nine), the z changes to a c, and the connecting y (and) becomes an i, creating diecinueve.

Why is there no word for "for" after Buscamos?

The Spanish verb buscar means "to look for" all by itself. You don't need to add extra words like para or por. Buscamos already means "we are looking for" or "we look for".

Why does pequeñas end in -as?

Descriptive words (adjectives) have to match the noun they describe. Since sillas (chairs) is feminine and plural, the word for small must also be feminine and plural: pequeñas. By the way, the number diecinueve doesn't change its ending; numbers 11 through 20 stay exactly the same whether the noun is masculine or feminine.

Why does diecinueve go before sillas, but pequeñas goes after?

Numbers that tell you how many (like diecinueve) always go before the noun. However, descriptive words that tell you what kind of thing it is (like pequeñas) usually go after the noun in Spanish.