Some planes have decreased seat width from 18" to 17" to fit in more passengers.

在某些情况下，座椅可以窄至 16 英寸。与这款符合人体工程学的桌椅相比。

Compare that with this ergonomic desk chair, with seat width ranging from 19" to 21.6" .

与这款符合人体工程学的桌椅相比，座椅宽度从 19 英寸到 21.6 英寸不等。

With regards to seat width, I think 18 to 19 feels more comfortable for most people.

关于座位宽度，我认为上台 18 到 19 的座位对大多数人来说更舒服。