Use the column-width property to specify the width of the columns. You can try to run the following code to implement the column-width property −
Example
<!DOCTYPE html>
<html>
<head>
<style>
.demo {
column-count: 4;
column-rule-color: gray;
column-rule-style: dashed;
column-width: 100px;
}
</style>
</head>
<body>
<div class = "demo">
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
</div>
</body>
</html>