We just put in a wood floor - and they were saying that the smaller boards will make a room feel bigger and the planks would make the room feel cozier. We did 3" planks of hand-scraped maple.

Here is our room:

We have a ranch and there is a narrow hallway to the BR. I felt like the 3" planks made the hallway seem wider.

Just my opinion and what I've heard - I can't wait to see what others have to say.

Ruth

Well, using a hall as a comparison (after all it is the smallest "room" anyone has) then I think the larger planks make a room "seem" wider.