I've emptied my 'one day' bags/suitcase because now everything fits. I've gone from a 26 to a 14 for trousers, 12 for tops/sweatshirts etc. However, I have one pair of size 14s, same brand as others, that will not yet fasten! It's very annoying, they're woolen, perfect given I feel the cold and my room at work is always very cool. It's so frustrating!
To be fair, they are 'vintage', 20 years old, but everything else in that size of that era fits. I measured them and they're more like a modern day 12. I remember a poster who worked in clothes manufacturing writing a very good post about changing sizes, but they're smaller than similar age trousers of the same size. Oh well, something to aim for!