I was trying on some shoes last week. A pair of everyday/work flats in my usual 6 1/2 but they felt loose. A bit strange since i have been the same shoe size since i was in my teens. I tried on a size 6 and it fit well. I also tried on a pair of wedges and again the 6 1/2 was too big but the 6 fit perfectly. So how could that be that after 10 years my feet shrunk half a size???? Is this normal...did it happen to anyone else out there???