Living Room / October 6, 2018 / Antonella Bonds.
These objects don't have to be the same height, but shouldn't be strikingly disparate in size, either. For example, using three silver candlesticks 10, 14 and 16 inches tall will look beautiful; using one 16-inch candelabrum with two four-inch ones will not. Your three objects can vary more from each other in style. However, a very ornate, Art Nouveau candlestick and a pair of more Spartan colonial-style ones may not play well together. Don't line up your three objects in military-fashion, either. Placing them several inches away from the outer edge of the mantel and at angles to each other and the room will give a much better appearance.
Now, find a single object you love that relates in some manner to the three items you've positioned at one end of your mantel. It doesn't have to be an object of the same kind but should have a color, feel, texture or shape that gives it something in common visually with the three pieces on the other end. Using the candlestick example above, you could choose a silver or China vase of the same period design as the candlesticks. Whatever object you want should be about three times the visual mass of the three objects at the other end and nearly twice as tall. Place this object in a bit from the other edge of the mantel. If your single purpose is a vase, you can increase its visual mass with flowers.