One of the most important parts of your business card is the information you provide on it – this will let your new contact know how and where to get in touch with you. Change the dimensions to 91mm x 61mm – this is standard business card size plus 3mm bleed area on each side.Change Paper Size from A4 to Custom Size in the drop-down menu.Open up a blank document in Microsoft Word.The first step of how to make a business card in Word is to set up your document to the correct specifications. Since Microsoft Word is one of the most popular ways to make a card from scratch, we created this easy, step-by-step guide on how to make your business cards in Word. Creating your own business card design from scratch is one of the best ways to make sure it represents you and what your business is all about.