Bought a pair of trousers from New Look, size 10 (usual size), however I struggled to even button them up 
So I went back to buy the size 12, which are huge on me! They sit on my hips until I take 2 steps forward then they're halfway down my bum. I checked the sizes on both, and there's nothing odd or misshapen about my body.
This is a regular occurance, in some shops I fit into a 6 and some I have to buy a 12. What the fuck is going on?! I can only guess that high street clothing chains use zoo animals to measure their clothes as none of it makes fucking sense! And don't get me started on tights!