Review on Immunity Shield: Leather Vaccination Business for Optimal Vaccination Protection by Rey Hossain

It was recommended as a vaccination card holder by travel writer The Points Guy, but my CDC-approved card is 5" x 4". The size of this product is ONLY 4 x 3 inches. So I don't understand how they think it's the right size. As far as I know there aren't multiple CDC approved vaccination cards (Version 17.08.20 MLS-319813_r) so what is this product really for? explain it. I've found that oilers of all types come in different sizes for the east and west coasts, so I'm wondering if there might be a different version of the CDC map?