Grid System

For example, let’s say you want a site that has:

  • 1 column on extra small devices
  • 2 columns on small AND medium devices
  • 4 columns on large devices
<div class="row">
  <div class="col-sm-6 col-lg-3">
    This is part of our grid.
  </div>
  <div class="col-sm-6 col-lg-3">
    This is part of our grid.
  </div>
  <div class="col-sm-6 col-lg-3">
    This is part of our grid.
  </div>  
  <div class="col-sm-6 col-lg-3">
    This is part of our grid.
  </div>  
</div>

We don’t have to define anything for extra small devices since the default is one column. We have to define a grid size for small devices, but not for medium devices. This is because the grid cascades up. So if you define a size at sm, then it will be that grid size for smmd, and lg.

 

Source:

http://scotch.io/bar-talk/understanding-the-bootstrap-3-grid-system

Spalte 1
Column 1
Spalte 2
Column 2
Spalte 3
Column 3
Spalte 4
Column 4