2
16 years of age.
18
16 with a mom and dad with you
18 +
18
18 years old
The age is 16, with or without parental permission.
In Ontario, a person has to be 18 to sign for their own tattoos or otherwise needs a parent or guardian's signature.
Unlike piercings, tattoos are only available to adult (legally). There is no age for parental consent in regards to tattoos in the state of oklahoma. Until you're 18 you can't legally get one.
Everything is legal in Amsterdam.
The legal age to get peircings in the USA is 18.