full size button bootstrap code example

Example 1: bootstrap buttons Sizes

Fancy larger or smaller buttons? Add .btn-lg or .btn-sm for additional sizes.
Large button
Large button

Small button
Small button

Block level button
Block level button

Primary link
Link

Example 2: bootstrap Buttons

Bootstrap includes several predefined button styles, each serving its own
semantic purpose, with a few extras thrown in for more control.
Using color to add meaning only provides a visual indication, which will
not be conveyed to users of assistive technologies – such as screen readers. 
Ensure that information denoted by the color is either obvious from the 
content itself (e.g. the visible text), or is included through alternative
means, such as additional text hidden with the .sr-only class.

Primary
Secondary
Success
Danger
Warning
Info
Light
Dark

Link

Example 3: bootstrap 4 button

Primary
Secondary
Success
Danger
Warning
Info
Light
Dark

Link

Example 4: bootstrap button full width

Create block level buttons—those that span the full width of a parent—by adding .btn-block.