What age is it normal / ok to be size zero?

6 months old! That's about normal!

i think the whole size zero (uk size 4) is wrong, its a danger to your long term health and if not sorted can lead to eating problems. society has made it so models are size zero to try and look better but i feel and so does my partner n our friends that it just looks horrid and unhealthy.

it's normal for anybody 2 be a size zero if that's what their body type dictates--eg-a thin petite frame. there r women in their 20'--30's a size zero cuz they r small boned and naturally thin.

If you look healthy and are a size zero than that's fine. It all depends on genetics, not necessarily age. Some women are just built really small. And others just have really high metabolism so they look unhealthy but are not. Speaking as a person who has been really underweight, my smallest size was a US size 3. Some people are just built that way. It really hurts when someone calls you twiggy or skin and bones. It really does, it's not your friends fault for being that way. Maybe as she gets older she will blossom a little more. But still, don't make it an issue between you two. It can really hurt her feelings. It's like calling a fat girl "pleasantly plump," that's just hurtful. My experience: Now that I'm pregnant I've actually filled up enough to look normal.

If you're naturally a small person then it's fine to be a size zero or 4 when you're any age. The only time it's bad is when you're not naturally small at all and risk your health by forcing yourself to maintain a lifestyle that's bad for you to get to it. I was probably a size zero when I was 13 but I'm 27 now and a size 10. So I wouldn't worry about your friend, she'll probably fill out anyway, but as long as she's healthy, it doesn't matter.

it really depends on the frame of your body. I still know people in their 20's and 30's who wear zero's, but that's because they are tiny people. Yes as you get older, you body's weight distributes itself differently, and a size zero at age 13, may look unhealthy on that person 10 years from now. Best way to do weight- don't go by dress sizes, pant sizes or even a weight number- go by what your body looks healthy at, and what you feel good at.

when ur six feet under

None! A mum of six adults... four are female... I'd tie them down and force feed them if they were size zero! I'm attempting to make my son gain weight... he's 23 and underweight because of stress and depression due to suffering from Asperger Syndrome... and I'm scared to hell he'll be seriously ill... and he only eats properly when I cook for him... in between... he doesn't... which is why I wish I was a man and six foot tall like him... so I could tie him to a chair and fill him full of muscle and fat building food for a month!

here in malta we use Uk measurements too, and i can tell you that for a 14 yr old, size 4 is way too thin!!!! Don't worry that you are not the same as your friend, some people are smaller and thinner by nature, or maybe her body has not grown up yet as much as yours has. i think for a 14 yr old, size 10 should be good. Exercise healthily to build up a healthy combination of muscle and fat (which is needed too!). the only age when size 4 is acceptable would be around 5 to 7 years!!