Silicone Double Flare 6mm The gauge size is 6mm (2G), but it seems that double flares are easier to put in if you go down one size, so it might be for 0G. I don't change my earrings very often, but I bought too many, so I'm selling them! Some have been tried on once or twice. They have been disinfected with rubbing alcohol. If you are concerned, please refrain from purchasing.