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

https://atomic-wiki.win/index.php/Ultrawide_Monitor_vs_Two_Monitors_for_Desk_Space:_What_Works_Best%3F

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