Demo of <U> with font size internal style



Normat text This is underline text. Normal text again

HTML

Normat text <u>This is underline text</u>. Normal text again

Style

<style>
u { 
 font-size: 40px;
}
</style>
<html>
<head>
<title></title>
<style>
u { 
 font-size: 40px;
}
</style>
</head>
<body>

Normat text <b>This is underline text</b>. Normal text again

</body>
</html>