what a good age for a girl to have her ears pierced

I took my daughter to get her ear pieced when she was little over year old. I knew she was not going to live for long time so I wanted her to get everything she can while she was with us. She was on the floor most of the time so she did lost several earring I gave it to her that was mine and I remember getting little upset. She couldnt help it. It wasnt her fault anyway. I dont know how old your daughter but if you want it and if you are going to clean up the ear for 4 to 6 weeks, and if she want it, you should.