This chapter includes examples of how to use the Bootstrap button. Anything with the.btn class will take on the default appearance of a grey button with rounded corners. However, Bootstrap has several button styling options, which are listed in the table below.
Button Size
1.btn-lg
This lg button makes the button size large.
2.btn-sm
This sm button makes the button size small.
3.btn-xs
This button makes the button size extra small.
4.btn-block
This btn block button creates block level buttons—those that span the full width of a parent.