Can you post a layout of the space?

I like my first idea best as far as use of space. I know people say not to put toilets on an outside wall. We had one in our last house in Iowa, but we had 2X6 construction. I don't know how high your window is, but I'm guessing the toilet would fit under there. The shower would be 5 feet long or shorter if you want a wider space to get to the toilet. (kind of tight the way I have drawn). You could do a 5 and half foot long shower and do an angled door at the left end to allow room between the shower and toilet. The vanity would be about 7 feet long, unless you do a 60 inch vanity with a linen cabinet at the door. I would reverse entry door swing if you do that.. The second top right could work and you would still have a small closet. The bottom left plan would require waterproofing your front window. Hopefully someone will give you other ideas. The bottom right plan is bigger, but no closet. Each square equals 1 foot.

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Thanks MissRed 58! I would not put a wall or enclose the toilet. Just build the shower and have either a full or half wall of tile next to the toilet .Then you can use the same treatment on the shower wall next to the window or use glass on the other 2 sides of the shower. The room will look and feel more spacious and light but you will still have plenty of privacy for the toilet. I understand wanting storage but I think if you put a cabinet with a solid wall next to the window you will lose the light and only view you have in the room. Actually if you do 2 sides of glass and a solid wall of tile next to the toilet it will give you an entire wall to put all of your plumbing with easy access from the toilet side if you have a problem. You could to half tile/half glass wall on the sides of the shower and build the 1 foot wide cabinet on the side of the shower near the window and same on the side near the toilet. But I always worry about leaks with half tile/half glass. Would probably prefer the 2 sided glass and 2 solid tile walls and optimize storage in the vanity. Or build the wall near the toilet thicker and add storage near the toilet if you feel you need. Hope you can follow my jibberish above!!