how to apply width to submit button in html code example

Example 1: how to increase size of input submit type in html

input[type=submit] {
    width: 20em;  height: 2em;
}

Example 2: how to increase size of input submit type in html

#search {
    width: 20em;  height: 2em;
}

Example 3: how to resize submit button in html

<input type="submit" id="search" value="Search"  />