I know about inconsistencies between brands and vanity sizing. This is more about the proportions of a size within a brand - say, a 12 in Whistles (but lots of other brands too).
I've suddenly found that a lot of brands that used to fit are really big on the waist. This is most definitely a not stealth boast about weight loss - I haven't lost weight, and I'm menopausal, so there's no way my waist is magically smaller!
I'm mildly pear-shaped, so there has always been the odd thing that fits on the hips but not the waist, but I'm now finding it all the time. And it's not just trousers/skirts either - tops are huge on the torso but fit on the shoulders/boobs.
Anyone else noticing this?