Compost heaps don't really need something to hold them. A simple pile at least 3 feet in diameter will work. This size has been determined as the minimum critical mass for good heating. 4 or 5 feet are hard to turn and will compact under their own weight. A simple hole in the ground will also work.
Some people dig a hole and fill it with material, using the dug up earth to cover each layer.
Some gardeners may want to build a bin to keep their heap in good shape and control animal pest. Simple structures can be made of steal wire mesh and treated stakes to use as support. They can be more elaborate and have mesh in wood framed panels. Bricks or Cement cedar blocks to well if layered on their side for air exposure. There are also many bins on the market if you would rather purchase one.