You can resize images in the Media Library.

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How can I change the size of thumbnails in WordPress? (3 Methods)
Before we explore how to regenerate thumbnail images in WordPress, it is important to note the ways in which images can be resized in the WordPress admin panel .

What's possibly even more essential is that these solutions won't necessarily resize older images, so you'll still need to go into WordPress, regenerate the thumbnail images without the help of a plugin, or use a plugin of another type.

If you want to resize a thumbnail or image, there are three main ways to do it:

Resizing images in your theme
Cropping images in the media library
Resize images in media settings
1. Resize images in your theme
Since your WordPress theme can modify the default image sizes, you can choose to switch themes or you can check if there are any settings available that are specific to adjusting image sizes.

Every theme is different, so be sure to check the respective croatia phone number data documentation to see if there is a way to resize your theme's images without having to install a completely different theme .

Alternatively, you can choose to create a child theme and resize the image with PHP code .

2. Cropping images in the media library
Another option is to resize images by cropping them in the Media Library .

Step 1
Go to Media > Library in your WordPress admin panel.

Then, click on an image in the list that you want to resize.

In the pop-up window, click the Edit Image button .

Click the button below the image to edit it.
Click the button below the image to edit it.
Step 2
After that, you have several options to edit the image.

You can click on the image and drag the mouse over it and release it when you have selected the area you want to keep. Then, you can click Crop .

If you want to crop the image precisely, you can adjust the aspect ratio by entering the ratio you want.

For example, you can use 1:1 to create a square or you can use 4:3, 16:9, and any other ratio you want.