Grid System
Bootstrap comes with a powerful responsive, mobile first fluid grid system that appropriately scales up to 12 columns as the device or viewport size increases. Ensuring that your website looks great on every device from desktop, table to smartphone. Default horizontal spacing: padding: 0 15px
.col-sm-1
.col-sm-1
.col-sm-1
.col-sm-1
.col-sm-1
.col-sm-1
.col-sm-1
.col-sm-1
.col-sm-1
.col-sm-1
.col-sm-1
.col-sm-1
.col-sm-2
.col-sm-2
.col-sm-2
.col-sm-2
.col-sm-2
.col-sm-2
.col-sm-3
.col-sm-3
.col-sm-3
.col-sm-3
.col-sm-4
.col-sm-4
.col-sm-4
.col-sm-6
.col-sm-6
.col-sm-2
.col-sm-4
.col-sm-6
Learn more: http://getbootstrap.com/css/#grid