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

https://www.cast-bookmarks.win/setting-up-a-comfortable-home-gaming-space-starts-with-the-right-measurements

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