如何在dompdf中设置字体大小？

I have a problem with font size in invoice generating using DomPDF. The font size is not affected in the generated pdf.

Here's the css code

a {
    font-family: 'arial';
    font-size:15;
}

it should be

a {
    font-family: 'arial';
    font-size:15px;
}

you forgot to add px in font-size

or as per your comment

<a style=" display: inline-block; font-size:15px; text-align: right; width: 100%;"> <?php echo "test";?></a>