a[button] button

a[button].button-small button.button-small

a[button].button-outline.button-small button.button-outline.button-small

a[button].button-clear.button-small button.button-clear.button-small

button.button-large H E L L O

a[button].button-outline.button-large button.button-outline.button-large

a.button-clear.button-large button.button-clear.button-large