"Nem magasak vagytok, hanem alacsonyak."

Translation: You are not tall, but short.

[Jimmy14389]

Doesn't magasak relate to "they" instead of "you"?

[SinisterBruce]

"Magasak" is plural, and this is second person plural (vagytok), which in English is rendered the same as the second person singular (you). Think of it as the Southern US "you all".