Wallpaper may be flat, but it's far from one-dimensional -- especially when you think outside the floor-to-ceiling box. From chair rails to headboards, these cut-and-paste creations -- some half-an-hour easy, some more involved -- add a layer of character to even the simplest spaces.

Illusion of Grandeur
Transform a humble room into a high-style statement with this easy visual trick: Cover the upper three-quarters of a room with an open, botanical wallpaper, and overlay the lower portion with a more linear pattern that simulates the effect of an elegant chair rail. For the latter, we chose a subtly sexy gray-lace design and applied it horizontally rather than vertically. Trimming along the top of the design with a utility knife created a sophisticated scalloped edge. For more pattern-pairing ideas and how-to instructions, click below.

Swatch and Learn: Pattern-Pairing Ideas
How to Install Wallpaper
How to Measure a Room

Sources: Neisha Crosland "Clematis Flower" wallpaper (top), $186 per roll, and Louise Body "Marneys Lace" wallpaper (bottom), $208 per roll, both by Stark Wallcoverings, Pacific Design Services, 310-360-6418. "Morrow" settee, $1,725, Jonathan Adler, 877-287-1910.
(Note: Many wallpaper companies quote prices per single roll, about 15 feet, but require a double-roll purchase.)