What cage is good for ten sisters?

Ten sisters are best raised with large cages, and the smallest specifications should also be used with 40*30*30.This bird's body is relatively small, native to the southern and Southeast Asia regions of our country. It has a gentle temperament and easy to raise.Its feathers are generally white and light brown. At the same time, there are black spots, and they don't like fighting. Even if dozens of them are raised together, they can still be fine.