- tanya, I've been doing it for about 5 weeks (just over as I started on a Thursday) and I have lost over a stone and over 4 inches off my waist, I started at a size 14 with a waist of 32.5, my main aim is to be a size 8, bout 9st 11 with a waist around 28, hopefully not long to go! drink loads of water.. i found the more you wee the more you loose! lol, good luck!! xxHey Nell, well done! Can I ask, what size are u aiming for? and how long have u been on the diet. I am a 14 just and wanting to get down to an 8.