Minimum size needed for wetroom!

I would be of the view that there wont be any saving really space wise without putting the toilet or sink too near the shower , a small shower tray is 800 by 800 as far as i remember , so if you mark that out on the floor are you really going to be able to tile with the necessary falls etc smaller than that , ? i wouldnt think so unless you were able to create a cubicle effect where the wet room has 3 walls and a shower door.

ya i understand your trying to save space but with a wetroom in such a tight space i have images of turning on the shower and soaking the toilet or sink every time you shower ,
I presume its downstairs you want the wetroom , 700 is fairly tight for a shower area i know if you have no choice its better than nothing , best bet really is to mark it all out with tape and a pencil , like make out toilet bowl and cistern , mark out sink position and then see what you have left and is it feasible to have a wet room there.
On the continent i have been in wet rooms that were small and all the tiles on the floor in the room had to be sloped to the drain as there was no curtain or glass panel , its not attractive washing yourself in the shower and soaking half the room in the process.