ear gauge          
noun [ C ] uk/ˈɪə ˌɡeɪdʒ/ us/ˈɪr ˌɡeɪdʒ/
 耳扩
a piece of jewellery worn in a hole made in the ear in order to stretch it
  He's still looking for phony ear gauges, discs worn in the earlobes.  他还在找假耳扩,那种戴在耳垂上的圆盘形饰品。 
 We carry a huge selection of ear gauges, plugs, and tunnels. 我们有大量不同的耳扩、楔形耳扩和耳圈可供选择。 
 See also: flesh tunnel
  (通过佩戴特殊的耳环而实现)耳洞扩大
the size of a hole stretched in someone's earlobe (= the soft round part at the bottom of the ear) by wearing special pieces of jewellery 
  Get the look of a larger ear gauge with this cheater plug.  带着这副会产生错觉的耳环,耳洞看着更大。 
 What ear gauge is the point of no return? 耳洞扩大到什么程度就不可逆转了? 
 - More examples
 - You can hardly go out these days without seeing at least a few people with plugs or ear gauges.
 - Technically, the ear gauge is the size, not the jewellery itself.
 - What does ear gauge surgery entail?