Most designers know how difficult it is to find a stylish collection of credit card icons. You have undoubtedly been to an online store that has grainy or inconsistant logos displayed on their product or checkout page. Aside from looking bad, those poorly designed credit card icons could be costing the ecommerce merchant sales. Professional and stylish looking payment method icons add legitimacy to an online store, and gives customers a boost of confidence in making a purchase. The following credit card icons are based on the most popular payment methods, and were created by Mark Dunkley, a designer at Shopify, an ecommerce platform. The free credit card icons come in two different sizes, 44px and 34px heights. You also have the choice to download a set with or without shadows and shine.