Responsive Grid
Columns sizes with col-[md|sm|xs]-*
.col-md-1 .col-sm-2 .col-xs-6
.col-md-2 .col-sm-4 .col-xs-7
.col-md-3 .col-sm-6 .col-xs-8
.col-md-4 .col-sm-8 .col-xs-9
.col-md-5 .col-sm-10 .col-xs-10
.col-md-6 .col-sm-12 .col-xs-12
.col-md-7 .col-sm-12 .col-xs-12
.col-md-8 .col-sm-12 .col-xs-12
.col-md-9 .col-sm-12 .col-xs-12
.col-md-10 .col-sm-12 .col-xs-12
.col-md-11 .col-sm-12 .col-xs-12
.col-md-12 .col-sm-12 .col-xs-12
Columns offsets with col-[md|sm|xs]-offset-*
.col-md-10 .col-md-offset-2 .col-sm-8 .col-sm-offset-4
Columns push & pull with col-[md|sm|xs]-[push|pull]-*
.col-sm-6 .col-md-push-6 (Left on small screens)
.col-sm-6 .col-md-pull-6 (Right on small screens)