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+---
+title: CSS Basic Box Model
+slug: Web/CSS/CSS_Box_Model
+tags:
+  - CSS
+  - CSS Box Model
+  - Guide
+  - NeedsTranslation
+  - Overview
+  - Reference
+  - TopicStub
+translation_of: Web/CSS/CSS_Box_Model
+---
+<div>{{CSSRef}}</div>
+
+<p><strong>CSS Basic Box Model</strong> is a module of CSS that defines the rectangular boxes—including their padding and margin—that are generated for elements and laid out according to the <a href="/en-US/docs/Web/CSS/Visual_formatting_model">visual formatting model</a>.</p>
+
+<h2 id="Reference">Reference</h2>
+
+<h3 id="Properties">Properties</h3>
+
+<h4 id="Properties_controlling_the_flow_of_content_in_a_box">Properties controlling the flow of content in a box</h4>
+
+<div class="index">
+<ul>
+ <li>{{CSSxRef("overflow")}}</li>
+ <li>{{CSSxRef("overflow-x")}}</li>
+ <li>{{CSSxRef("overflow-y")}}</li>
+</ul>
+</div>
+
+<h4 id="Properties_controlling_the_size_of_a_box">Properties controlling the size of a box</h4>
+
+<div class="index">
+<ul>
+ <li>{{CSSxRef("height")}}</li>
+ <li>{{CSSxRef("width")}}</li>
+ <li>{{CSSxRef("max-height")}}</li>
+ <li>{{CSSxRef("max-width")}}</li>
+ <li>{{CSSxRef("min-height")}}</li>
+ <li>{{CSSxRef("min-width")}}</li>
+</ul>
+</div>
+
+<h4 id="Properties_controlling_the_margins_of_a_box">Properties controlling the margins of a box</h4>
+
+<div class="index">
+<ul>
+ <li>{{CSSxRef("margin")}}</li>
+ <li>{{CSSxRef("margin-bottom")}}</li>
+ <li>{{CSSxRef("margin-left")}}</li>
+ <li>{{CSSxRef("margin-right")}}</li>
+ <li>{{CSSxRef("margin-top")}}</li>
+ <li>{{CSSxRef("margin-trim")}} {{Experimental_Inline}}</li>
+</ul>
+</div>
+
+<h4 id="Properties_controlling_the_paddings_of_a_box">Properties controlling the paddings of a box</h4>
+
+<div class="index">
+<ul>
+ <li>{{CSSxRef("padding")}}</li>
+ <li>{{CSSxRef("padding-bottom")}}</li>
+ <li>{{CSSxRef("padding-left")}}</li>
+ <li>{{CSSxRef("padding-right")}}</li>
+ <li>{{CSSxRef("padding-top")}}</li>
+</ul>
+</div>
+
+<h4 id="Other_properties">Other properties</h4>
+
+<div class="index">
+<ul>
+ <li>{{CSSxRef("visibility")}}</li>
+</ul>
+</div>
+
+<h2 id="Guides">Guides</h2>
+
+<dl>
+ <dt><a href="/en-US/docs/Web/CSS/CSS_Box_Model/Introduction_to_the_CSS_box_model">Introduction to the CSS box model</a></dt>
+ <dd>Explains one of the fundamental concept of CSS: the box model. This model defines how CSS lays out elements, including their content, padding, border, and margin areas.</dd>
+ <dt><a href="/en-US/docs/Web/CSS/CSS_Box_Model/Mastering_margin_collapsing">Mastering margin collapsing</a></dt>
+ <dd>Sometimes, two adjacent margins are collapsed into one. This article describes the rules that govern when and why this happens, and how to control it.</dd>
+ <dt><a href="/en-US/docs/Web/CSS/Visual_formatting_model">Visual formatting model</a></dt>
+ <dd>Explains the visual formatting model.</dd>
+</dl>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName("CSS3 Box")}}</td>
+   <td>{{Spec2("CSS3 Box")}}</td>
+   <td>Added <code style="white-space: nowrap;">margin-trim</code></td>
+  </tr>
+  <tr>
+   <td>{{SpecName("CSS2.1", "box.html")}}</td>
+   <td>{{Spec2("CSS2.1")}}</td>
+   <td></td>
+  </tr>
+  <tr>
+   <td>{{SpecName("CSS1")}}</td>
+   <td>{{Spec2("CSS1")}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>