[![enter image description here](https://i.stack.imgur.com/Sp3JA.jpg)](https://i.stack.imgur.com/Sp3JA.jpg)

Look at the picture. There is a round blue seat that belongs to a sofa set. People can sit on the sofa while putting their legs on it for relaxation.

Sometimes, we can see them in the lounge of a bank or a cinema or in waiting rooms in general like in this picture
[![enter image description here](https://i.stack.imgur.com/6bDw2.png)](https://i.stack.imgur.com/6bDw2.png)

**Note:** It may or may not have legs, it it does, then the legs should be very short.

**What is the round seat that often belongs to a sofa set called?**