Varias buenas respuestas ya, pero ahora con el iPhone 6 y 6 Plus no se aplican esas dimensiones "normales":
/* iPhone 6 landscape */
@media only screen and (min-device-width: 375px)
and (max-device-width: 667px)
and (orientation: landscape)
and (-webkit-min-device-pixel-ratio: 2)
{ }
/* iPhone 6 portrait */
@media only screen
and (min-device-width: 375px)
and (max-device-width: 667px)
and (orientation: portrait)
and (-webkit-min-device-pixel-ratio: 2)
{ }
/* iPhone 6 Plus landscape */
@media only screen
and (min-device-width: 414px)
and (max-device-width: 736px)
and (orientation: landscape)
and (-webkit-min-device-pixel-ratio: 3)
{ }
/* iPhone 6 Plus portrait */
@media only screen
and (min-device-width: 414px)
and (max-device-width: 736px)
and (orientation: portrait)
and (-webkit-min-device-pixel-ratio: 3)
{ }
/* iPhone 6 and 6 Plus */
@media only screen
and (max-device-width: 640px),
only screen and (max-device-width: 667px),
only screen and (max-width: 480px)
{ }
/* Apple Watch */
@media
(max-device-width: 42mm)
and (min-device-width: 38mm)
{ }
+1 Buen hallazgo. Agregaré la URL de referencia aquí también. http://www.stuffandnonsense.co.uk/blog/about/hardboiled_css3_media_queries/ –
No diría que la lista es "exhaustiva": hay muchas laptops con pantallas de menos de 1224 píxeles – HorusKol