Measuring a bicycle chain's pitch can be used to identify chain wear and flag the need for a replacement chain and/or cogs and chainrings. Bicycle Chains: Length, Width, What's Best to Buy etc.
An industrial, or scaffold, piercing is made up of two holes that are connected by a single piece of jewelry (usually a long barbell). An industrial piercing is commonly made through the cartilage on the upper ear, with one hole close to the head and the other further down on the outer rim. Two or more industrials on one ear is sometimes referred to as an ear cage.
16 gauge - 10mm-fits most rook and tragus-you need 4mm from piercing to edge of ear. 16 gauge - 12mm-standard size-usually perfect for daith piercing. 16 gauge - 15mm-bigger size-made for daith piercing for statement look but may work for other piercings. PLEASE find out what gauge your piercing is before purchasing!auge is wire thickness. 20 gauge is the size of a normal lobe earring -16 is the thickest for this heart. Size width is in millimeters (mm) - Measured from the inside of the heart where it curves, to the other inside of the heart.