Why Isnt Circular Border Showing Up Css

When I first started designing websites, I came across a frustrating issue: my circular borders weren’t showing up in CSS. I spent hours troubleshooting and searching for solutions, only to find myself more confused than ever. After some trial and error, I finally figured out why circular borders weren’t appearing as expected. In this article, I’ll share my insights and provide a detailed explanation of the problem.

Understanding the Box Model

Before diving into the issue itself, it’s essential to understand the box model in CSS. Every element in HTML is considered a box, which consists of four components: content, padding, border, and margin. The border property allows us to define the border around the content of an element. By default, the border is rectangular, but we can modify it to create circular borders using some additional CSS properties.

When using the border-radius property in CSS, we can achieve circular borders by setting the value to 50%. For instance, border-radius: 50%; will create a circular border around an element.

The Missing Piece – Width and Height

One crucial detail that often goes unnoticed when creating circular borders is specifying the width and height of the element. Without these dimensions, the circular border won’t appear correctly, or in some cases, it may not appear at all. This is because the circular shape is defined based on the width and height of the element.

Let’s consider an example:

<div class="circle"></div>

In the above code snippet, we have a div element with a class of “circle.” We set the width and height to 100 pixels and apply a 2-pixel solid black border with a border-radius of 50%. This should create a perfect circular border around the div. However, if we omit the width and height properties, the border will not appear as expected.

Other Possible Causes

In addition to missing dimensions, there are a few other potential causes for circular borders not showing up properly:

  1. Overflow: If the content within the element exceeds the specified dimensions, it can prevent the circular border from displaying correctly. Ensure that the content is contained within the specified width and height.
  2. Transparent Background: If the background of the element or its parent is transparent, the circular border may not be visible. Consider setting a background color or image to make the border stand out.
  3. Z-Index: If other elements overlap the element with the circular border, the border may be hidden behind them. Adjusting the z-index property can solve this issue.


Creating circular borders in CSS can be both rewarding and frustrating. By understanding the box model, ensuring appropriate dimensions, and troubleshooting other potential causes, you can overcome the issue of circular borders not showing up. Remember to pay attention to detail and experiment with different approaches until you achieve the desired result.