Historically, explanation has been associated with causation: to explain an event or phenomenon is to identify its cause. But with the growth and development of philosophy of science in the 20th century, the concept of explanation began to receive more rigorous and specific analysis.
For jewelry applications, gauges 12-28 are most common. The size of wire is defined by one of two measuring systems. The American wire gauge (AWG) and the Standard wire gauge (SWG) systems.
(In wire gauges, a higher gauge number = thinner wire. For example, 12 gauge is a fairly thick wire, while 26 gauge is very thin.). The most common earring wire sizes: 20, 21, and 22 gauge. 1  21 Gauge 2  â. If I had to choose one size that would fit most pierced ears, and be compatible with most earring styles â I would pick 21 gauge.