I'm 5' 3.5", and weigh 143lb. take a US size 10/12 and UK size 14 (loose)(M&S). I kept a detailled diary of my weight loss against inch loss for a year and a half while I lost 30LB on Atkins. I found that if I added together my inch loss on my hips and waist, then one inch equalled 3LB. and that was pretty constant throughout the weight loss. Overall I lost 6" from my waist and 4" from my hips. So based on that, for me, 12LB = one dress size near enough. I've been coasting for a year now (no gain, no loss) and am back on the Atkins diet to try to lose the last 10 - 14lb.