Dimensions Generally visiting cards comes in two standard sizes. American size and Business size. American size is 92 X 54. Both the cards can be designed either horizontally or vertically according to the choice of the user. 2-3 mm space is left for the margin from the border of the card.
Impressions Using colors depends upon the type of the card and the cost.
More the colors more the cost is the rule of thumb. Formal cards need less color. It can be single color card or maximum two colors. The type of processing is also important. If the photograph is used for the card then it goes for offset printing.