When I was 175, 7-14lbs would be a dress size. Now I'm 197, I've lost 15lbs and am still in the same clothes. I anticipate wearing the same trousers for the next 30lbs (albeit uncomfortably) because my midsection is the bit disappearing right now, but as long as my legs are the same size, I'm not going to get into the next size down. A lot of it depends on composition, so think of the last place you put weight on. It seems to drop off for many people on a "last in, first out" basis. Once I lose the next trouser size, I fully anticipate losing 3 sizes on my top half until I'm 10 top half & 16 bottom half. That's why my goal is quite low, apart from being the last place I felt good, it's the only weight I've ever been at where my top and bottom halves are in proportion.
I swear I had a short answer