The space in the thoracic cavity between the concave inner surfaces of the lungs, in which (in a special pericardial cavity) the heart is located, is called the mediastinum. The thoracic cavity is lined with a serous membrane called the pleura. The lungs are enclosed in the so-called pleural cavities, which are separate in man but communicate with one another in the majority of mammals. The shape of the thoracic cavity depends upon the shape of the thorax and the position of the diaphragm.
We sell 5 hammock sizes on the Traditional Hammocks (no spreader wood bars). Therefore, the length of the hammock is the same for each size but the difference is the width. Width gives the size. The larger the size, the wider and bigger the hammock.
After you have made your own hammock, the next major step is hanging the hammock. For those without trees or a hammock stand, a set of hammock posts is simple enough to install. You will need a bit of room in the yard to bury them, as they should be a minimum of twelve feet apart. Many sources recommend 15 feet as the optimal length. If you don't have that much space, 12 feet will be sufficient.