What size chandelier should I purchase for my dining table?

Hang your chandelier so that its lowest point is 30-34 inches from the tabletop (I suggest leaning toward the higher end of this margin).  The diameter for a chandelier hung over a table should be one foot less than the width of the tabletop to avoid hitting heads. If you want to place two smaller chandeliers over a long table, choose a diameter that’s about one-third of the width of the table.

What size chandelier should I buy for my ceiling height?
Use this great ratio: 2.5 inches in fixture height per 1 foot of room height. The rule is simple—the taller the ceiling, the taller the chandelier.

The larger the space, the wider the chandelier.

Where you choose the hang the chandelier—and at what length—not only impacts the overall look of your space, but also how functional it is. If it’s too close to the ceiling, the light won’t properly distribute; too low down and it can disrupt traffic flow.