I am tiny too... i had to buy my chest. The largest I could go was 275cc which was the smallest they had lol but on my small frame, it was exactly enough.
I think certain people have to have meat in their diet... like people who are prone to sports injuries or who have certain illnesses. Some people can get away with none.. the average person could do well with small amounts id think. In junior high health we were told that we only needed a 2oz to 5oz serving though.. people tend to over do things like eat giant steaks and wrap everything in bacon. The body needs a balance.
Finding individual balance can be tricky.