A 48x24 desk offers just enough space for your 27-inch monitor and gaming gear...

https://oliviamaids.com/why-does-sitting-too-close-to-my-monitor-feel-tiring/

A 48x24 desk offers just enough space for your 27-inch monitor and gaming gear without feeling cramped. Keeping at least 36 inches clearance behind your chair means easy movement and comfort during long sessions