how to make button small in bootstrap code example

Example 1: large button in bootstrap

<!-- Large buttons -->
<button type="button" class="btn btn-primary btn-lg">Large button</button>

<!-- Medium Buttons -->
<button type="button" class="btn btn-primary">Large button</button>

<!-- Small Buttons -->
<button type="button" class="btn btn-primary btn-sm">Large button</button>

<!-- Block Buttons -->
<button type="button" class="btn btn-primary btn-lg btn-block">Block level button</button>

Example 2: bootstrap button bigger

<button type="button" class="btn btn-primary btn-lg">Large button</button>
<button type="button" class="btn btn-secondary btn-lg">Large button</button>