According to this website, a 5'5" woman should weight 117-130,127-141, or 137-155 depending on frame size.

http://www.healthchecksystems.com/heightweightchart.htm

For a 5'7 man, the numbers are 138-145, 142-154, 149-168. My frame is on the larger size. Even so, I guess I should try to get down to 155 pounds. I am curently around 170 pounds. When I got up to 225 pounds 13 years ago I became terrified. I basically almost starved myself for a while to keep myself from getting any heavier. The scary part about gaining plenty of weight is that fat cells can then multiply, muking it that much harder to lose weight. I was so miserable being 75 pounds overweight.