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

https://wiki-net.win/index.php/Do_I_Really_Need_Two_Monitors_for_Gaming%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