If you are selling your house or flat as a 3 or 4 or more bed house, then make sure the viewers remember it as that by putting the correct size bed in them. The most recent flat I dressed in SW2 was a compact 3 bed Victorian house.
The 3rd bedroom was very narrow and quite long and just had a wardrobe and some shelves in it.
A similar property was on the market and the owners were using it as a dressing room.
Clearly my client and their neighbours were not giving that room enough credit which I believe would impact the perceived value of the property.
When we dressed it, we made sure it had a single bed and chest of drawers and striking furnishings so that room was memorable.