accountiod – https://www.accountiod.com/credit-card-size/

Have you ever stopped to think about how credit and debit cards, even from different issuers, slip into your wallet so easily? This is because all bank cards in the US and worldwide have a standard size. This not only makes it more convenient for you to carry them around but also simplifies the process for machines to recognize and read the cards when you make a purchase or withdraw cash.