<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<div id="text01">やっぱりゾウが好き</div>
<div id="text02">やっぱりゾウが好き</div>
<div id="text03">やっぱりぞうが好き</div>
div#text02 {
font-size: medium;
}
div#text03 {
font-size: small;
}