Dining room tables come in many different shapes and are made from many different kinds of materials. There are two different shapes of dining room tables. Rectangular and round shaped. Rectangular tables work well in long rooms. This shape allows a lot of people to sit along either side of the table, particularly when the insert leaves are installed. Tables with softly rounded edges are a better choice for parents with small children in the house or for families with members who are using wheelchairs or walkers. The curved corners make it easier to move around the table with less risk of injury.