Lots of people have to make do with a small bathroom, but there are things that you can do to give the appearance of space and to make the room look bigger.
Large patterns can make a room look smaller. If you have large patterned tiles or lots of different patterns, you will find it looks a bit cramped and cluttered. Using bright and light colours will help give the appearance of space. Hanging a mirror on the wall is a clever trick to use to make your room look larger and adding a backlight to your mirror only emphasises this.
Hiring a specialist design company is the best way to make the most out of the room you have available. They will be able to design everything to fit exactly to the dimensions of the room which helps itemise the space. You may be surprised exactly how much you can fit in to a small bathroom if it is design correctly.
If you are really struggling for space then you may decide that actually you want to extend your bathroom first. You will need to ensure that you plan your design out first and that you check before knocking any walls through, that they are not supporting walls.