What are the difference between col-lg and col-md in bootstrap3

Question

What are the difference between col-lg, col-md ,col-xs and col-sm grid system in in bootstrap 3.

In a bo

Answer 1

They added all those classes for one column grid in that template because those classes correspond to column extra small, small, medium and large devices.

.col-xs = *Extra small devices (ie Phones) (<768px)

.col-sm = Small devices (ie Tablets) (≥768px)

.col-md = Medium devices (ie laptops, or small desktops) (≥992px)

.col-lg = Large devices (ie Desktops) (≥1200px)*