This stretchy arm pocket is large enough to hold the larger cell phones. The front mesh pocket lets you see and use your cell. Hands-Free way to listen to your music/books while working out. Two back pockets for key, ID, money, credit card, gym pass. Stretches on and can't fall off. Wear on upper or lower arm (even leg to hold your wallet.) Wear wherever comfortable for you. Size approx: 4.5" x 6"