I have yet to see the size listed as "3x5.5" -- first it was 3x5, then 3.5x5 -- and I've been wondering if they're taking the "real" USPS post cards which are 3.5x5.5 -- they're keeping us flummoxed! I suspect the contest is contracted out there in IL and whoever draws the cards out at whatever time for whatever prize doesn't pay much attention to size, appearance, etc. -- just that the info is correct. Out of the millions of cards they're getting, I doubt they do much sorting. (Didn't know they were doing any at all online for YOAMD -- though the online thing ended in Oct -- will have to check that out).