Can you tell me, how big aloe vera plant?

This plant can grow to be about 24 inches or 2 feet tall, but if you give your aloe vera plant good conditions and time, it may reach 3-4 feet (36-48 inches) tall!

Aloe vera plants are usually between 12 and 24 inches tall (30 to 60 cm). They form a beautiful rosette of long, fleshy leaves that can spread out to about 1-2 feet (30-60 cm) wide, so you'll have plenty of room to grow and enjoy them! In the right conditions, some varieties can even grow up to 3 feet (90 cm) tall — isn't that amazing?

maybe 2- 3 feet ?

This plant is amazing! It's already about 1.5 feet tall and it's so easy to grow!