The gauge of the needle used for ear piercing depends on the type of piercing being performed and the preferences of the piercer. Generally, smaller gauge needles (18-20) are used for ear and facial piercings, while larger gauge needles (12-14) are used for body piercings. Standard ear piercings are typically 20g or 18g if they were pierced by a gun, while if they were pierced by a professional, the lobe piercing will typically be a 16g or 14g. It is important to note that piercings should only be performed by trained and experienced professionals using proper equipment and sterile techniques to minimize the risk of infection and other complications.