My friend has lost around 18-20 pounds. She is still wearing the exact same sweats we worked out in a year ago. They are just baggier now. Problem is, she has trouble remembering what they looked like 20 pounds ago. So when she looks in the mirror, she can't see any change.
It's tempting to say, "But I want to lose more weight, so I don't want to buy new clothes". Money is always an issue, I know. But sometimes, your eyes will lie to you and you'll see yourself in those same XL sweats and think you are still XL. Uh uh, oh no. Be proud of your changing shape, bite the bullet, and get something that fits well. It's easier to see the improvements when they are not hiding under the same clothes you felt fat it.