Wayfair shipped the wrong rug, I received one that was 1'7 1/2 X 4' 1/2" instead of the 2' X 5' that I had originally ordered. Wayfair wants me to ship it back for $8.95 or get a 20% discount, which is the lesser of evils.

I can see an error of a 1/2" or so, but not 4 1/2 ".
C'mon guys, you can do better.  If all else fails, get a ruler  !