Bashir, to get an effective guidance on your question, it would be helpful to provide a floor plan showing plumbing, windows/doors, existing layout and to describe a bit about your vision. It can also be helpful to provide a plan that shows relationship to other rooms. Pending that information, I suggest considering the size of the sink and shower, storage needs, how many users and whether you prefer built-in storage or storage units (as in moveable furniture/shelving). A trick I have used is to build in a pull-out pantry that runs the depth of the shower--dramatically increasing storage in what would otherwise be unused space. Good luck in your planning!

also will give illusion of a bigger bathroom if you use bigger tiles ..I used small ones on one wall as feature wall and larger ones on other walls ..

Far out, that is a small space. Love what you've done with it!

Nik Star, I’m jealous of your bigger space ; ) - but so happy you have now been reacquainted with your messing tape! We are toying with the idea of putting a cavity slider in. Thank you Ripple Effekt Siriuskey - yes I really LOVE the concept of a “wet room” - Never imagined that our space was big enough for this but now seeing it’s possible, thinking about trying the bath under the window, then the shower and then vanity on the bottom left corner - just flipping yours slightly. Just trying to find a good bath that’s narrower design to allow for the biggest vanity possible. You are all awesome!