I received/won a small charm pack. When I went to use it, with some additional 5" from my stash.... OMG they we not the same size. The pinked charm pack was almost (less a scant) 5" if it was measured at the widest point. So while sewing, I had to 'adjust' for the smaller squares.
It is aggravating that 'everyone' downsizes things. Coffee is no longer 3 lbs, ice cream is smaller then a half gallon and just the other day I noticed that my TP is smaller. Even our bolts are (some not all, yet) smaller/shorter, used to be 44", now about 42"
With the quilting we are taught to be accurate and precise .... sure makes it harder with everyone scrimping on measurement.