Seeing an oddball fractional weight on a product is a good clue that it's been downsized. If it's weight or volume is in fractions of an oz...

I usually buy things in bulk and the downsizing is now so fast and furious that I often can't find the same size paper product by the time I need more. Seems they hardly last 6 months before being downsized again and put into a new form of packaging to hide the fact.