The best ring sizer, finger sizer gauge we sell! These metal/plastic ring sizers are great to figure out what ring size you wear and no matter what sizing scale you use. Order these before you order any online rings. The right ring sizer should be easy getting on and hard to get off-this is the perfect size! Most people have a different size for each of their 10 fingers! Make sure you order your rings in the right size! Universal Sizers-European, English, USA, etc.