The standard dimensions of a business card are 3.5 x 2 inches or 8.9 x 5.1 cm. This size is highly pocketable and fits nicely into a wallet, purse, or pocket. However, there are other sizes available for business cards, including square cards (2" x 2"), rounded corner cards (3.5" x 2" with quarter-inch rounded corners), and folded cards (3.5" x 4") . Its important to keep all important text and design elements within the safe area, which is the 1/8 inch around the margin of the card, to avoid having them trimmed off during cutting.