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.
1 18-16 gauge work well for making sturdy clasps and jump rings (see about wire hardness for more info). 2  They're also great as necklace and bracelet wire. 3  Solid (not plated or filled) wire in these gauges is commonly used to make rivets. 4  18ga makes good ear wires too.