Widths to use in media queries

Question

What are the most important media query widths for all devices like desktops, tablets, laptops/Ipads, Iphones and Smartphones? Are there any standard widths for these devices?

Answer 1

I'm looking everywhere for the best answer for this. Here what I found.

@media (min-width:320px) { /* smartphones, iPhone, portrait 480x320 phones */ }
@media (min-width:481px) { /* portrait e-readers (Nook/Kindle), smaller tablets @ 600 or @ 640 wide. */ }
@media (min-width:641px) { /* portrait tablets, portrait iPad, landscape e-readers, landscape 800x480 or 854x480 phones */ }
@media (min-width:961px) { /* tablet, landscape iPad, lo-res laptops ands desktops */ }
@media (min-width:1025px) { /* big landscape tablets, laptops, and desktops */ }
@media (min-width:1281px) { /* hi-res laptops and desktops */ }

I think this is better considering with mobile first approach. Start from mobile style sheet and then apply media queries relevant for other devices. Thanks for @ryanve. Here is the link.