If you're retrofitting a new faucet to an existing sink or buying a complete sink ensemble, be sure to match the type of faucet to the hole openings in your sink.

Single-hole faucets combine the spout and mixing handles—often a single lever—into one unit that requires only one drilled sink hole. For retrofits, some models include a bottom plate that will cover existing three-hole openings. Single-hole faucets are ideal for smaller sinks, such as powder room baths. Their simplicity reflects modern sensibilities.

Center-set faucets fit standard three-hole sinks (with outer holes drilled 4 inches apart). They'll have either a single lever or two handles mounted on a 6-inch plate. They're ideal for most bathroom sinks.

Widespread mounts have three separate pieces: Two handles and the spout. The standard distance between the handles is at least 8 inches, and the three pieces tend to be larger than other types of bath faucets. Smaller versions, called minispreads, are designed for standard holes drilled 4 inches apart.

Wall mount faucets have gained popularity along with freestanding or vessel-type sinks that require longer spouts that extend well over the top of the bowl.

Not every faucet fixture can be easily categorized. Kohler, for example, makes a faucet that's integrated into a mirrored wall cabinet. All you see is the tiny flow control lever peeking out from the bottom of your mirrored self.