A business card is a highly personal form of marketing and does exactly what you need it to. Business cards serve the key purpose of marketing your business and getting your key contact information into your client's hands… all in a matter of seconds. Fundamental to the value of the business card, is its portability. There are so many options to choose from whether it be the paper stock, finish etc.
For uncoated paper, 80# is a good choice for a basic, lower cost card. 100# paper is thicker, and the cost is only slightly more.