A 48x24 desk gives you just enough space for a 27-inch monitor, keyboard, and a...

https://miasimpressiveperspective.quantlynix.com/posts/how-much-desk-space-do-i-need-for-a-full-size-keyboard-and-mouse-pad

A 48x24 desk gives you just enough space for a 27-inch monitor, keyboard, and a cup of coffee without feeling cramped