Congratulations on being near your first target weight.

When I chose my goal weight I did it from when I knew I was an acceptable size when I was 21. I then took off 6 pounds as I know my scales weigh light.

I was very interested to look at this issue yesterday on the internet. Various sights gave me a very varied figure from my ideal weight. Any where from 70 pounds to 120 pounds. The problem for me is I'm so small I'm under the 4 ' 10" norm for women and I think the information below that point is unreliable.

In the end you need to go with what feels right for you and as has already been suggested tweek the numbers up or down when you get near to your target to reflect reality.