Learn German: Der Garten ist siebenundneunzig Meter lang. - The garden is ninety-seven meters long.

In German, numbers from 21 to 99 are put together "backwards" compared to English. You say the single digit first, then und (and), and finally the tens digit. So for 97, you combine sieben (7) + und + neunzig (90) to make siebenundneunzig.

Are long numbers like siebenundneunzig always written as one single word?

Yes! In German, numbers below one million are written as one continuous word, no matter how long they get. You never use spaces or hyphens like we do in English (ninety-seven).

Why isn't there an "s" at the end of Meter since it's plural?

In German, many masculine and neuter nouns that end in -er don't change their spelling when they become plural. You just say ein Meter (one meter) and siebenundneunzig Meter (ninety-seven meters).

Is the word order for measurements exactly the same as in English?

Yes, the structure here matches English perfectly! You state the number (siebenundneunzig), then the unit of measurement (Meter), and finally the adjective describing the dimension (lang for long, hoch for high, etc.).