I think it also depends on where you lose weight faster and if you're down sizing in the same brand of clothing. I lose inches in my waist very fast and can easily wear a 6 now as long as it is skirt that doesn't hug the hips and thighs. My hips and thighs are a different story. I can't get into regular Calvin Kleins in a size 10 because of my huge thighs. When I was a lot thinner (125-130lbs), it took about 10-12lbs to go down a size and thighs and hips were still an issue sometimes.