This question is about "**Simple chair anatomy?**"

Most people know what are "**the legs or the back of the chair**" 

I found this picture on the internet

[![enter image description here](https://i.stack.imgur.com/4lET6.jpg)](https://i.stack.imgur.com/4lET6.jpg)

Look at the picture on the right. They call it "**the face of the chair**" which is the part of the chair that people sit on.

My question is that:

is "**the face of the chair**" a common term just like its counterparts "**the legs or the back of the chair**"?

Most people say "**the legs or the back of the chair**" but I haven't heard "**the face of the chair**"?

Could we say "**Do not put your feet on the face of the chair**"?