Great Items for Fireplace Mantel Decorating Picture frames. Candlesticks. Statues. Vases. Clocks. Decorative boxes. Framed prints, paintings, and mirrors (lean them against the back wall for a casual look, then layer smaller pieces in front of them) Decorative plates (on stands) Click to see full answer. Similarly, you may ask, how do you decorate over a mantle?Hang a large, plain mirror above your mantel and then place a smaller, decorative mirror in front. Reflective surfaces also bounce light around a room and can make a space feel larger—a major win in a small space.Secondly, is it OK to put a mirror above a fireplace? “Just don’t hang a mirror there. When placed over a fireplace, a mirror is too high to actually be used as a mirror. More importantlyit’s going to reflect what is across from it. Placement over the fireplace means it could be reflecting a bare wall, a light fixture, a doorway. Similarly, it is asked, how big should a picture be over a mantle? The rule of thumb is that an artwork — or mirror — should be about two thirds the size of the fire surround and mantel over which it hangs, but here that rule has been broken to great effect.What color should a mantle be?Many new mantels come unfinished so you can select the colour of paint or stain you want. Others may come in a bright white, or get finished in a generic bright white as they are installed. And while white certainly blends in with a lot of different colour schemes, it isn’t always the best choice for your mantle.