It’s the same size as a credit card, and about as thick as four to five of them, and is the thinnest self contained charger on the market today. It easily fits in your wallet, shirt or pants pocket, or your pocketbook. Its totally self contained with two connectors. A USB connector and an interchangeable micro, iphone5, 5C, & 5S, iPhone 6 6Plus. Any of which fit inside the card.