About clothes sizing.
I have today bought a dress from Phase Eight in a size 10. Trust me, when I say I am no size 10. I have a jumper from Phase Eight which is an 18. I bought it when I was a size 16 because the 16 was too small. Go figure, as they say.
I have two blouses from Coast which are a bit too small for me and they are both 16s. I have just bought a blouse today, also from Coast. It is a 12 and it fits perfectly. 
Today I am wearing a White Stuff dress today in a 12 and it fits like a glove. I have just tried to buy another White Stuff dress today in a 12 - fits on body but way too small on chest. Tried on the 14 - too big on body, but still too small on chest. 
Have a White Stuff skirt and M&S skirt in 12s which are both a bit big, but I can barely fit into M&S size 12 jeans. AAAARRGGGHHH!!!!
What size AM I? 