A picnic table is a project you can buy all the material for and build in a day. Relatively simple and straight forward you can build a table that will last for decades. The table I will describe here is a large one, 28 inches wide (table top) and 8 ft long. It has benches attached to the table and is stable and strong. Certainly you can modify these plans to meet your needs. I have one that has a top that is 4 ft square based on the same design.