Chandeliers are suspended light fixtures meant to be the centerpiece to your room. They are awe-inspiring, and special consideration must be made as they set the tone for your design and style. When choosing the correct chandelier size for dinning room tables. The chandelier should be about one half to two thirds of the table. For rooms and other large spaces, add the length and width of the room together in feet. And use that number in inches for the optimum chandelier size.