CSS Properties: How to specify a thick border?

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HTML Code:

<!DOCTYPE html>
<title>How to specify a thick border</title>
<style type="text/css"> 
h1.xyz {
border-style: solid;
border-width: thick;
<p>w3resource Tutorial</p>
<h1 class="xyz">Thick border</h1>
<p><b>Note:</b> The border-width property does not work alone.</p>

Live Demo:

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

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