18 years. 
We do not tattoo anybody who is under 18 years old, even if the parents would permit it.

If you are or look young, remember to take recognizable photo identification with you. Passport, driving license, bankcard, post’s I.D. are recognized as proper I.D.s in Norway. If you have changed or grown a lot since your ID photo was taken, please get a new one made, so we can be sure it is your on the ID you use.