So you started a weight loss plan, and feel great already, but why haven’t you gone down a size in clothes? Stick with it and don’t worry, because once you lose 15-18 pounds lost, your weight loss will start to show. In fact, this is exactly the same time you go down a size in clothes. Don’t forget to wear smaller clothes if you want your weight loss to show. If you continue to wear the same clothes, they will fit much better, but it is very unlikely you weight loss will be noticeable to others.