Consider Shape. You have several shapes from which to choose. The two most common shapes are rectangular and circular. Some people prefer a circle shape believing that this shape facilitates better conversation. It's easier to fit more people around the table with a rectangular shape. If you add leaves to a circular table it will become an oval. An octagonal table is another option.
Here are a few tips on dining room design including furniture and decor suitable for the more conventional home and family unit that needs to inspire welcomed guests.
Consider Your Needs. Ask yourself what do you need in furniture for the dining area? The need determines the size and function of the furniture you'll get. A wine cabinet for example could be purchased by because one needs a large storage for wines in the house. The size of table you'll get is determined by the number of people who would use it. Big families would need a larger table to accommodate many people while smaller ones and maybe bachelors would need smaller ones. Function is also a consideration. Bachelors and smaller families may consider getting a dining table that have foldable extensions that may be put away if not in use just in case there might be surprise visitors.