Apple Sizes

/* iPhone < 5 */
@media screen and (device-aspect-ratio: 2/3) {
    .content{
        max-height: 320px;
    }
}

/* iPhone 5 */
@media screen and (device-aspect-ratio: 40/71) {}

/* iPhone 6 */
@media screen and (device-aspect-ratio: 667/375) {}

/* iPhone 6 Plus */
@media screen and (device-aspect-ratio: 16/9) {}

/* iPad */
@media screen and (device-aspect-ratio: 3/4) {}