We can’t answer that question – sorry
The post on the plastic stud is usually slightly thicker than a metal stud
simply to add strength to the post.
Ultra Hypoallergenic studs can easily be trimmed using scissors or nail clippers to a comfortable length. We like to use a nail file to round the end afterwards and then clean with the microfiber jewelry cleaner.
Each set of earrings comes with extra backs. If all of those get lost, additional backs can be ordered on our website.