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<!DOCTYPE html>
<html>
<head>
<style>
div {
  font-size: 30px;
  border: 1px solid black;
}
​
span {
  font-size: 1ex;
}
</style>
</head>
<body>
​
<div>The font-size of the div element is set to 30px. <span>The span element inside the div element has a font-size of 1ex</span>.</div>
​
</body>
​
<!-- Mirrored from www.w3schools.com/cssref/tryit.asp?filename=trycss_unit_ex by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 13:17:19 GMT -->
</html>
​
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