I like this idea for small bath; Our bathroom is a bit wider and the sink is on the other wall, but with a tall glass door closet and drawers under the sink, this layout could work.
This all white bathroom not only has a large tub and an open shower but built in storage for all the linens and towels.
little bathroom with slanted ceilings and moroccan style tiles on the floor. by Camilla Ekwall
Simple tiny bathroom laundry room with washer dryer combo. hang clean clothes over washer/dryer and put sink in shower save a whole lot of space!