Stretching piercings is not the same as getting a new piercing and things must be considered when stretching beyond what jewelry size typically goes in a specific piercing. Once a piercing is stretched past a certain point, it will not close normally again.
Again, since bodies vary from person to person, there is no real way to tell where that point is for everyone. It is important to remember that the effects of stretching may not be irreversible should you decide to remove your jewelry.
Overstretching your piercings can result in a “blowout”, which essentially means an excessive build up of scarring and reduction of healthy blood flow. This makes the tissue around the piercing easier to thin, tear, and quite possibly even result in the loss of your piercing.
Avoid stretching your ears more than one size at a time, especially when you reach larger sizes. Rushing through the process is not the way to get the result that you want.
It is a good idea to see a professional piercer to help you with piercing stretches. While it may seem easy, it can result in some very negative effects. A professional will be able to go over all of the details with you, select the appropriate jewelry, and gently insert the pieces to ensure that the stretch is done in the best way possible for your body.
Also please note that tapers are not intended to be worn as jewelry and can drastically effect the positive outcomes of stretching. Misuse of tapers can result in serious damage.