This pack of 5 body piercing needles come with your choice of size. All 5 needles will be the size you choose. Needles have been sterilized using ethylene oxide (EO) gas. stamped with the date of sterilization as well as with the expiration date of the sterilization. These are high quality surgical stainless-steel needles. They are all standard length loop bars to fit all the machines and tubes.