This is the most important rule for professional-looking, attractive window treatments: Hang the curtains high to give your room a luxurious illusion of extra height. The pole or valance should be positioned a minimum of 4 inches and a maximum of 12 inches above the top of the window in most cases. The curtain lengths make the ceilings seem taller and the room more polished, maybe even a bit formal.
If your living space has high ceilings already, compliment them with tall curtain lengths. Floor-to-ceiling curtains can also help to divide space, whether you’re tucking away a window seat (like the floor-to-ceiling curtains via Lonny) or cutting a whole room in half. Heads up: The worst thing you can do when hanging curtains from the ceiling is to hang them too short. The heightening trick-of-the-eye doesn’t work well if the curtain line abruptly cuts off before it hits the ground.
Cons to floor length? They may make your room look too formal for your liking. Dust will inevitably collect around the bottoms. Also, children may be more likely to grab them and use them as a climbing rope. If you’re asking yourself, “Should curtains go to the floor?,” and kids, pets, and dust aren’t a concern, then floor length is probably your best bet.