shrinking 'S' or expanding ME...

I went shopping last weekend...I tried a few blouses (size 'S) and i realize that they were too small for too tight for me...sigh...I know I dont have a super model figure hence that is why the blouses dont fit but at the same time I was thinking I have many many blouses at home which are size 'S' and still fits...some which I bought more than ten years ago. I know I have put one weight these few years but somehow, many of my blouses and even saree blouses still fit...may be this entry is just part of being in denial but anyway my theory is that... the size 'S' has shrunk... :)