To set up a gaming space in a small room, start with a desk about 100 to 120...

https://smoothdecorator.com/is-100-cm-wide-enough-for-a-pc-gaming-desk/

To set up a gaming space in a small room, start with a desk about 100 to 120 centimetres wide to fit your monitor and keyboard comfortably. Use a monitor arm to save desk space and keep your screen at eye level