son grandes

they are big

→ ser
phrase Uncommon #20,161
they are big Can also mean “they are great” when describing people or things figuratively.
SP: Los edificios son grandes.
EN: The buildings are big.

Son grandes héroes.

They’re great heroes.

Sus nidos son grandes y blancos.

Their nests are large and white.

Las ballenas son grandes y los insectos son pequeños.

Whales are big and insects are small.

Por eso son grandes.

That's why they are great.

Estos coches son grandes.

These cars are big.

Esas manzanas son grandes.

Those apples are big.

No sólo son grandes, también son deliciosos.

Not only are they big, they're delicious too.

— El recuerdo de Marnie (2014)

Son grandes.

They are big.

Sólo son grandes bocas.

They’re just big mouths.

— गल्ली बॉय (2019)

Dijiste que no era y ahora son grandes amigos.

You said it wasn't and now you're great friends.

Los osos son grandes y fuertes.

Bears are big and strong.

Su charla es dulce, sus ojos son grandes ¡Pues que suene el tambor!

Her speech is sweet, her eyes are big—so let the drum sound!

— हम दिल दे चुके सनम (1999)

Sí, por suerte privacidad y amabilidad no son grandes asignaturas.

Yes, fortunately, privacy and kindness aren’t major subjects.

— Fack ju Göhte (2013)

Los chinos son grandes trabajadores.

The Chinese are hard workers.

Mis pies son grandes.

My feet are big.

— La Grande Vadrouille (1966)

Son grandes amigos.

They are great friends.

Las peras son grandes este año.

The pears are big this year.

Estos perros son grandes.

These dogs are big.

Esas casas son grandes.

Those houses are big.