HTML exercises

CSS Properties: How to define the thickness of the border?

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HTML Code:

<!DOCTYPE html>
<title>How to define the thickness of the border</title>
<style type="text/css"> 
h1.xyz {
    border-style: solid;
    border-width: 20px;
<p>w3resource Tutorial</p>
<h1 class="xyz">Thickness border</h1>
<p><b>Note:</b> The border-width property does not work alone.</p>

Live Demo:

See the Pen border-length-width-answer by w3resource (@w3resource) on CodePen.

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