what is the size of a business card

The standard size of a business card in the United States is 3.5" x 2". This size is also commonly used in Canada. In the UK and most of Europe, the standard size is slightly smaller at 3.3" x 2.1". Other available sizes for business cards in the US include 3.5" x 2.5" and 3.5" x 1.75". Square business cards are available in sizes such as 2.5" x 2.5", 3" x 3", and 3.5" x 3.5". Rounded corner business cards are 3.5" x 2" with quarter-inch rounded corners. Circle business cards are typically 2.5" in diameter. While there are no officially regulated standard business card sizes in the United States, the de facto standard size is 3.5" x 2".