I feel like I post this every two weeks. But today I wore a size 18 dress from M&S I bought two years ago in the sale. It's chiffon with a side zip. No streach and fitted. I wore it this time last year. I wore it today. I can maybe pull it loose one inch below my bust where it is the most fitted. How does this work? Where has the three stone gone? There is zero chance I squeezed into it before as its fitted chiffon. It would have ripped. I wouldn't comfortably get into a smaller size of this dress either. I put my height and weight into AI who said I'd be a UK size 14-16. I'm a size 20. I don't mind. But I look thinner. I can't work it out?