Basic, Functional 3/4 Bathroom Plans ~~ The 3/4 bathroom is a tough fit. You've got to squeeze a toilet, sink, and shower or tub into a fairly small space. Here we've got a space that is roughly 8 feet by 5 1/2 feet (7.8 feet by 5.6 feet, to be exact), and the mission here is to push all of those items into this small space. Features of this bathroom plan: Economical use of space. Prevents toilet from facing doorway.