How big are things?

If you don't know how big something is (furniture and the like) and how much room is required, find out, don't stop work. Don't just guess. Please don't draw beds that are 4x4m, toilets that are 1.5m long or doors that are 400mm wide and 1500mm high.

You could:

1. Measure one
2. Google (Google is quite difficult to use to find appropriate info)
3. Refer to a book with anthropometric data

Good books with anthropometric data include:

Ernst Neufert, Architects' data
the Metric Handbook
Julius Panero's Human dimension & interior space