I'm not sure how old you have to be but the piercing itself is $30 + $15 for the back. You then have to factor in the cost of whatever jewelry you chose. My piercing cost $111 in total! There website states more about age requirements!
16 with parents permission they have to be there with you if you are under the age of 18 it varies on the jewelry mine was 130$ because I chose a gold moon
At least 18 to be by yourself. And price depends on the type of jewelry.
Thanks! Your answer is awaiting moderation.