That is exactly same size as our old bathroom we redid. Had window on back wall in tub/shower area. My pics show before and the floor in progress. Somehow I can't find any good ones of the finished project.
Gutted it to the studs, Cement backer all around except "front" wall where door came in.
Used existing vanity cabinet and over toilet cabinet. (had replaced them only a few years earlier)
12" square floor tiles
8" x 13" wall tiles all around to about 4ft high"
row of geometric listellos at top and finished off w/ bullnose.
Took the tiles up above window all around in tub area and tiled all around window. (double hung vinyl window w/ privacy glass on bottom pane)
Replacing the vanity cabinet w/ a pedestal would have opened the space some, but having the storage was important. This was our primary bathroom. Second bathroom in basement was little more than functional, not much decor.