The most basic buttons without any icons or properties
Outline buttons
Fixed width
Add class .btn-fix for the minimum fixed width
Size Options
Add .btn-lg, .btn-sm, or .btn-xs for additional sizes.
Create block level buttons—those that span the full width of a parent—by adding .btn-block .
Rounded, Circle Buttons
add .btn-rounded for the rounded buttons
add .btn-circle for the circle buttons