Having small bathroom is not big problem now, you can install this steam shower cabins, This steam shower just take 100 x 80 centimeters (39.3 x 31.4 inches). and also features 12 bodyjets, chromatherapy, tropical rain, ozonator, four mood spots, coaster, sequential massage and foot massage settings.
I think this bathroom designer want to solve a problem in small bathroom with luxurious steam shower, just like in the picture. this steam shower also comes with a seat when you really want to kick back and relax. that is For Smaller Bathrooms use this Steam Shower Cabins from bathroomdesignsidea.com