Learn Italian: Il giro del parco è lungo due chilometri. - The loop around the park is two kilometers long.

In English we put the measurement before the adjective (two kilometers long), but in Italian it is the exact opposite. You state the dimension first, like lungo (long), alto (tall), or largo (wide), followed by the actual number and unit of measurement.

Does the word giro always mean a physical loop?

Giro is a very flexible word that translates to loop, lap, turn, tour, or ride depending on the context. A very common phrase you will hear is fare un giro, which means to go for a casual walk, a drive, or a spin.

Why use del parco instead of just di parco?

Literally, this sentence says the loop 'of the' park. To say 'of the' in Italian, you cannot just leave the words separate. You must combine the preposition di (of) with the definite article il (the). When di and il merge, they become the combined preposition del.

How would I use the grammar from this lesson to say 'every loop' or 'all the loops' of the park?

To say 'every loop', you use ogni followed by the singular noun without an article: ogni giro. If you want to talk about 'all the loops', you use tutti followed by the plural definite article and plural noun: tutti i giri.