iOS Question WebView Text Size

Hi,
I have a WebView loading an html file on which I have some paragraphs. I need to make the text size larger, but whatever number I set the size in

<p class="paragrafo" style="font-size:50px; align:justify>

Click to expand...

the shown text size is always the same.
Can I achieve a bigger text size shown on the WebView? And how?

EDIT: solved. I was writing bad code. Now it works.