<P> The main benefit to the cardholder is convenience . Compared to debit cards and checks, a credit card allows small short - term loans to be quickly made to a cardholder who need not calculate a balance remaining before every transaction, provided the total charges do not exceed the maximum credit line for the card . </P> <P> Different countries offer different levels of protection . In the UK, for example, the bank is jointly liable with the merchant for purchases of defective products over £ 100 . </P> <P> Many credit cards offer rewards and benefits packages, such as enhanced product warranties at no cost, free loss / damage coverage on new purchases, various insurance protections, for example, rental car insurance, common carrier accident protection, and travel medical insurance . </P> <P> Credit cards can also offer a loyalty program, where each purchase is rewarded with points, which may be redeemed for cash or products . Research has examined whether competition among card networks may potentially make payment rewards too generous, causing higher prices among merchants, thus actually impacting social welfare and its distribution, a situation potentially warranting public policy interventions . </P>

Whats the standard size of a business card