Start by picking a desk 100 to 120 centimetres wide to fit your gear without...

https://wiki-zine.win/index.php/Creating_the_Perfect_Work_and_Gaming_Desk:_A_Multi-Purpose_Setup_for_Small_Spaces

Start by picking a desk 100 to 120 centimetres wide to fit your gear without crowding. Use a monitor arm to free up space and position your screen at eye level. Leave at least 60 centimetres of chair clearance for comfortable movement