Mobile device screen resolutions

There are dozens of graphics display resolutions. Below is a table with a few of the most significant devices for web designers:

Responsive Design Screen

As you can see, there are a variety of dimensions as well as resolutions (defined as pixel per inch). The resolution (PPI) is an important factor — for example, the size of an icon on the iPhone 5 will be 4 times bigger when displayed on a desktop monitor.

responsive screen sizes

Courtesy: 99designs.com