what is the mm on a credit card
Credit card The size of most credit cards is 85.60 mm × 53.98 mm (​3 3⁄8 × ​2 1⁄8  inches) and rounded corners with a radius of 2.88–3.48 mm,[5] conforming to the ISO/IEC 7810 ID-1 standard, the same size as ATM cards and other payment cards, such as debit cards.[6]
Card security code The card security code is typically the last three or four digits printed, not embossed like the card number, on the signature strip on the back of the card. On American Express cards, the card security code is the four digits printed (not embossed) on the front towards the right. The card security code is not encoded on the magnetic stripe but is printed flat.