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Add sizes for Bootstrap Buttons
Bootstrap provides several CSS classes to control button sizes, from large buttons to block-level buttons that span the full width of their container.
Button Size Classes
| Class | Description |
|---|---|
.btn-lg |
Creates large buttons with increased padding and font size |
.btn-sm |
Creates small buttons with reduced padding and font size |
.btn-xs |
Creates extra small buttons (Bootstrap 3 only) |
.btn-block |
Creates block-level buttons that span the full width of parent element |
Example: Different Button Sizes
Here's how to implement buttons with different sizes using Bootstrap classes:
<!DOCTYPE html>
<html>
<head>
<title>Bootstrap Button Sizes</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css">
</head>
<body>
<div class="container mt-4">
<!-- Large button -->
<button type="button" class="btn btn-primary btn-lg">
Large Button
</button>
<!-- Default size button -->
<button type="button" class="btn btn-primary">
Default Button
</button>
<!-- Small button -->
<button type="button" class="btn btn-primary btn-sm">
Small Button
</button>
<br><br>
<!-- Block level button -->
<button type="button" class="btn btn-success btn-block">
Block Level Button
</button>
</div>
</body>
</html>
Key Points
- Size classes are additive: Combine with any button style class (btn-primary, btn-secondary, etc.)
-
Bootstrap 4 vs 3: The
.btn-xsclass was removed in Bootstrap 4 -
Block buttons: Use
.btn-blockfor full-width buttons, useful for mobile layouts - Responsive design: Consider using different sizes for different screen sizes
Conclusion
Bootstrap's button size classes provide flexible options for creating buttons of different sizes. Use .btn-lg for emphasis, .btn-sm for compact interfaces, and .btn-block for full-width actions.
Updated on: 2026-03-15T23:18:59+05:30
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