Default
Outline
Disabled Button

use .disabled in class .btn class to get Disabled button

Sizes [ Large ]

use .btn-lg in class .btn class to get Large button

Sizes [ Small ]

use .btn-sm in class .btn class to get Small button

Checkbox Button
Radio Buttons
Button With Icon
Outline Icon Buttons
Only Icon
Outline Icon
Basic Button Group
Button Toolbar
Button Toolbar Size

use .btn-group-lg in class .btn-group class to get Large size button group

this is default size

use .btn-group-sm in class .btn-group class to get Small size button group

Nesting
Vertical Variation