If you’re going to called jewellery for stretched ears, ‘gauges’, then using that logic (It’s measured in a gauge, therefore it’s named a gauge), you must also call shoes ‘sizes’, drinks must be called ‘litres’, clothes must also be called ‘sizes’. Fruit sold by the pound, becomes known as ‘pound/s’. You can no longer buy sugar, you have to call it ‘kilograms’
Also, the gauge system only goes to 00g, so after that, and up until 1”, they must be called ‘fraction-of-inches. After that, they become known as ‘SICK INCHES’. Small jewellery is also measured by the gauge system (as well as in mm) so, anyone with a piercing has SICK GAUGES.
Surely this explains as to why we don’t refer to plugs, tunnels, eyelets, earskins, the stretched lobe themselves, as gauges.
You don’t have speedometers in your ears.