JSFiddle - React, Tailwind, and code Playground

HTML

<button class="button-large">
  Large
</button>
<button class="button-small">
  Small
</button>

CSS

.button-large,
.button-small {
  background-color: #fff;
  border: 1px solid #333;
  padding: .5rem 1rem;
}

.button-small {
  font-size: .75rem;
}

.button-large {
  font-size: 1.25rem;
}