Can a 13 year old get a ear stretcher piercing?

Ear stretching is something that after you get to a certain point, cannot be reversed, so I would hold off on stretching your ears till you are a little older to be sure that this is what the adult you will want, and not just the impulsive actions of your present self. To answer your question though, no shop would gauge your ears out at your age. The only way to go big in one go is to pierce the ear with up to a 2G. needle, anything fatter is too hard to shove through the skin. Then there is biopsy punches, which are used in the medical field. This is essentially a circular scalpel which cores out a chunk of flesh. If you get your ears done like this though, then they will never close smaller than they were originally punched due to the fact that the skin does not regrow.