> For the complete documentation index, see [llms.txt](https://help.sdocs.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sdocs.com/sdocs/template-architecture/images-in-s-docs/dynamic-image-solutions/insert-field-image-resize.md).

# How to: Use a CSS Selector

This guide will walk users through how to use CSS and more specifically a CSS Selector to resize an image.

CSS Styling for an image within a custom field. Useful for dynamic images that are various sizes.

Use a selector to set dimensions for specific HTML entities such as `div.class1 img`

{% code title="template.html" %}

```html
<style type="text/css">div.class1{
  max-width: 400px;
  max-height: 400px
}

div.class1 img {
  width: 100%;
  height: 100%;
}
</style>
<div class="class1">{{{!Objectname.fieldname}}}</div>
```

{% endcode %}

### Understanding the Source

In the above code block we provide our \<div> with a class **class1.**

```
<div class="class1">{{{!Objectname.fieldname}}}</div>
```

The template is being populated with an image stored in a field, meaning we have a rich text field that will require 3 curly braces. The Selector will set the width and height of any image \<img> to its full value that is found within a \<div> with class **class1.**

<figure><img src="https://1548664070-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FWKNnJmhJBQwhdk5WBFsi%2Fuploads%2FK7qrfmc6cH4hJoeKTN6l%2Fimage.png?alt=media&amp;token=ccc1e1dd-7e42-499f-a06b-c63505289ff6" alt=""><figcaption></figcaption></figure>


---

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