Limited Synthetic Opal Barbell
All sizes have an approximate 6mm wearable area with a 3mm back ball.
Available with either a 3mm, 4mm, or 5mm opal cabochon.
The ball end is externally threaded while the opal end is internally threaded.
Jewelry is measured through a gauge system (see chart below). The higher the gauge number the smaller the wire is. A standard "earring" is usually 20 gauge. Jewelry gauges/sizes can vary between manufacturers. There is no universal regulation on companies to make a standard size in body jewelry. A big part of this is that some jewelry is made overseas and measured in millimeters. And in the USA jewelry is measured in inches/gauges. So many times jewelry can be anywhere from .5mm to 1mm different.