---
title: <big>
slug: Web/HTML/Element/big
translation_of: Web/HTML/Element/big
---
<div>{{obsolete_header}}</div>

<h2 id="概要">概要</h2>

<p>The HTML Big Element (<code>&lt;big&gt;</code>) 会使字体加大一号（例如从小号(small)到中号(medium)，从大号(large)到加大(x-large)），最大不超过浏览器的最大字体。</p>

<div class="note">
<p><strong>使用备注: </strong>由于它是纯显示性的，该元素在<a href="/en-US/docs/Web/Guide/HTML/HTML5" title="/en-US/docs/Web/Guide/HTML/HTML5">HTML5</a>中已经被移除，不应当再使用。取而代之，网页开发者应当使用CSS属性。 </p>
</div>

<h2 id="属性">属性</h2>

<p>只包含 <a href="/en-US/docs/HTML/global_attributes" title="HTML/global attributes">全局属性</a></p>

<h2 id="示例_1">示例 1</h2>

<pre class="brush:xml">&lt;p&gt;
  This is the first sentence. &lt;big&gt;This whole
  sentence is in bigger letters.&lt;/big&gt;
&lt;/p&gt;</pre>

<h2 id="示例_2_(CSS_版)">示例 2 (CSS 版)</h2>

<pre class="brush:xml">&lt;p&gt;
  This is the first sentence. &lt;span style="font-size:1.2em"&gt;This whole
  sentence is in bigger letters.&lt;/span&gt;
&lt;/p&gt;</pre>

<h3 id="结果">结果</h3>

<p>This is the first sentence. <span style="font-size: 1.2em;">This whole sentence is in bigger letters.</span></p>

<h2 id="DOM_接口">DOM 接口</h2>

<p>该元素实现了 {{domxref('HTMLElement')}}接口.</p>

<div class="note"><strong>实现备注: 直到</strong> Gecko 1.9.2, Firefox 为该元素实现了{{domxref('HTMLSpanElement')}}接口.</div>

<h2 id="浏览器兼容">浏览器兼容</h2>

<p>{{CompatibilityTable}}</p>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Edge</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Edge</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="参见">参见</h2>

<ul>
 <li>{{htmlelement("small")}}, {{htmlelement("font")}}, {{htmlelement("style")}}</li>
 <li>HTML 4.01 Specification: <a class="external" href="http://www.w3.org/TR/html4/present/graphics.html#h-15.2">Font Styles</a></li>
</ul>

<div>{{HTMLRef}}</div>