To get the right size chandelier for your dining room you will need to get the overall diameter of your room. For example if your room is 12ft. X 16ft. the diameter of your room is 28ft. in diameter. Convert your measurements of feet to inches and you have the size of chandelier you will need for your room. So for a 28ft. diameter you would need a 28” inch chandelier in diameter. The correct height to hang a chandelier in the dining room is around 30-38” from the table on an 8ft. ceiling. If your ceilings are higher than eight feet you can adjust the height so you’re not looking directly at the bottom of the chandelier when you’re sitting down or standing up. For larger ceilings 10 feet and up consider a larger size chandelier with 2 or 3 tiers to fill the space and have it looking more in place. Take into consideration the size of your dining room table, you don’t want an oversized chandelier that may hang over the sides of the table. If the room is larger and the ceilings are higher you may choose to go with a larger chandelier, have it hung higher treating the room more like a foyer.