I could go with this one. 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.
Small Bathroom Floor Plans Designs Narrow Bathroom Layout for Effective Small Space
Long and narrow Bathroom Layout
Narrow bathroom benefits from shower window to break up the space and provide fresh air.
feature tiling the back wall of the bathroom... makes the whole thing look like a shower.
Narrow sink for a small fresh white bathroom in a swedish space.
glass door over width of shower in narrow bathroom
smalle badkamer | natuursteen | glaswand | mozaiek utrecht voor badkamerontwerp