Full size food pans are perfect for buffets and many other serving situations. The measure about 12" x 20" which will fit one column of a hot or cold well. The full size food pans are made of different plastics; some polyethylene, some polysulfone, and poly carbonates. Each will insulate the food for a certain time period. Don't forget your covers. We carry a wide range of food pan cover styles. Some just sit flat on top, some with handles, some with a notch for a ladle or serving spoon, and some that seal over the top of the food pan. All covers are sold separately.