Bests & Worsts Reviews from Amazon

I have only found one daily bra that fits me right, feels good, and is comfortable to wear all day and that is the Playtex 4803 18 hour. In the past I have always got them from Walmart but I really hate shopping at Walmart and this would literally be the only thing I would go into the store for. So I ordered the exact same manufacture, style number and size as I normally in at Walmart and I get this Bra that LOOKS the same in styling, has the same numbers on it but it is much smaller. It says that it is a 42C. So the band size is SUPPOSE to be 42 but when I measure it it, I find that it is 34. That is EIGHT (8) whole inches smaller than what it has printed on it. Don't believe me, look at the picture. Why is the Playtex bra from Amazon so much smaller than what is printed on it and than the exact same one from Walmart?