Often, 2nd piercings are on the smaller side, or new piercings done at mall locations may also be a tight to very tight fit for 18ga. Note that 20ga will be a bit more delicate than the 18ga! My very popular reverse hoop earrings, now available in hypoallergenic Titanium, Niobium, or Surgical Steel for those with sensitive ears - or for if you just like the color options!