Start your gaming setup with a desk around 100 to 120 centimetres wide to fit...

https://alpha-wiki.win/index.php/Gaming_Setup_Ergonomics_Basics_I_Can_Do_in_10_Minutes

Start your gaming setup with a desk around 100 to 120 centimetres wide to fit your essentials without crowding. Use a monitor arm to free up surface space and keep screens at eye level