Whoop had to get changed when I got to work today - I had left my size 18 jeans in the car from martial arts, so put my size 20 jeans on and they were huge on me! Like stupidly so. They fitted me last week! They now have a saggy ar$e, baggy knees and a spare few inches round the waist!!!! Madness! Does mean I only have one pair of trousers that fit again though... argh!