iPhone X
/* Portrait and Landscape */
@media only screen
and (min-device-width: 375px)
and (max-device-width: 812px)
and (-webkit-min-device-pixel-ratio: 3)
/* uncomment for only portrait: */
/* and (orientation: portrait) */
/* uncomment for only landscape: */
/* and (orientation: landscape) */ {
}
iPhone 6+, 7+ and 8+
/* Portrait and Landscape */
@media only screen
and (min-device-width: 414px)
and (max-device-width: 736px)
and (-webkit-min-device-pixel-ratio: 3)
/* uncomment for only portrait: */
/* and (orientation: portrait) */
/* uncomment for only landscape: */
/* and (orientation: landscape) */ {
}
iPhone 6, 6S, 7 and 8
/* Portrait and Landscape */
@media only screen
and (min-device-width: 375px)
and (max-device-width: 667px)
and (-webkit-min-device-pixel-ratio: 2)
/* uncomment for only portrait: */
/* and (orientation: portrait) */
/* uncomment for only landscape: */
/* and (orientation: landscape) */ {
}
Source: Media Queries for Standard Devices