True story:
Today I went to my disabled mother's house (our old house) to do some wash, re-organize her room and hang up some curtains she purchased awhile back. they all looked the same and I didn't bother to check the sizes... I asked if they were all the same to which she replied "yes, of course"...
I proceeded to dress the first windows (she wanted 2 panels per window). Huh? one is two feet shorter than the other.... pulled looked at the packages... first one 42X84. Second Panel package is 42X63... ok... lets take a look perhaps its a one off.... uh no... she had 5 different sizes of the same fabric curtains... I could only make one set...
At least I got a good laugh.