diff --git a/index.html b/index.html
index c28d537..5e2caf3 100644
--- a/index.html
+++ b/index.html
@@ -335,6 +335,16 @@
                   </optgroup>
                 </select>
               </p>
+              <p>
+                <label for="select_multiple">Select (multiple)</label>
+                <select id="select_multiple" multiple="multiple">
+                  <optgroup label="Option Group">
+                    <option>Option One</option>
+                    <option>Option Two</option>
+                    <option>Option Three</option>
+                  </optgroup>
+                </select>
+              </p>
             </fieldset>
             <p><a href="#top">[Top]</a></p>
             <fieldset id="forms__checkbox">