We taped out our floor plan for the tinyhouse on the living room floor last night too. It only used about one third of our living room! Surprisingly, it felt more spacious than imagined, like "ya, this actually WILL work." This is a good exercise that I would recommend. It helped us make a few tweaks for the better.
This is actually our old floor plan (10x20) but it gives a better idea perhaps of what's taped on the floor. It's based on this but reduced to 8x20 to fit on a trailer.