Weight Loss Program

So let’s say that someone is short (around 5′2″), someone else is taller (mediumish), and the last person is tallest (6′0″).
If they all weigh the same, how many pounds of weight would it take to make the weight loss visible?
What other factors should be considered?

I just started the weight watcher’s point system and flex points, and I was wondering when I might see weight loss.

I just started the weight watcher’s point system and flex points, and I was wondering when I might see weight loss.

Even though my body is shaping up, my weight stays the same and the reason for the weight loss is to bring my blood pressure down and get off the pills. That is even after 6 weeks of being on the program.