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

https://inchesguide.com/how-much-space-do-you-need-for-a-comfortable-home-gaming-setup-a-measurement-guide/

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