Bootstrap Grid - Medium Devices
Bootstrap Grid Example: Medium Devices
| Extra small | Small | Medium | Large | |
|---|---|---|---|---|
| Class prefix | .col-xs | 
    .col-sm | 
    .col-md | 
    .col-lg | 
  
| Screen width | <768px | >=768px | >=992px | >=1200px | 
In the previous chapter, we presented a grid example with classes for small devices. We used two divs (columns) and we gave them a 25%/75% split:
<div class="col-sm-3">....</div>
<div class="col-sm-9">....</div>
But on medium devices the design may be better as a 50%/50% split.
Tip: Medium devices are defined as having a screen width from 992 pixels to 1199 pixels.
For medium devices we will use the .col-md-* classes.
Now we will add the column widths for medium devices:
 <div class="col-sm-3 col-md-6">....</div>
<div class="col-sm-9 col-md-6">....</div>
Now Bootstrap is going to say "at the small size, look at classes with -sm- in them and use those. At the medium size, look at classes with -md- in them and use those".
The following example will result in a 25%/75% split on small devices and a 50%/50% split on medium (and large) devices. On extra small devices, it will automatically stack (100%):
Example
 <div class="container-fluid">
  <h1>Hello World!</h1>
  <div class="row">
    <div class="col-sm-3 col-md-6" style="background-color:yellow;">
      <p>Lorem ipsum...</p>
    </div>
    <div class="col-sm-9 col-md-6" style="background-color:pink;">
      <p>Sed ut perspiciatis...</p>
    </div>
  </div>
 </div>
Try it Yourself »
Note: Make sure that the sum always adds up to 12.
Using Only Medium
In the example below, we only specify the .col-md-6 class (without .col-sm-*). This means that medium 
and large devices will split 50%/50% - because the class scales up. However, 
for small devices, it will stack vertically (100% width):
Example
 <div class="row">
  <div class="col-md-6" style="background-color:yellow;">
    <p>Lorem ipsum...</p>
  </div>
   <div class="col-md-6" style="background-color:pink;">
     <p>Sed ut perspiciatis...</p>
  </div>
</div>
 
Try it Yourself »The next chapter shows how to add a different split percent for large devices.

