People started gauging or stretching peircings several hundred years ago. Gauges are commony used in ears though thay can be used elsewhere. The term gauges refers to the jewlery, not the stretch ear itself. Gauges are sometimes also known as plugs,and come in sizes.
The smallest size is usually 20. the size number goes down, but the lower the number the bigger the gauges. They go in even numbers form 20 down to 00(double zero). From there they still get bigger, but they are in fractions.
Man your gauges are huge!