Stunning visuals play a crucial role in creating an engaging website. Whether you run a personal blog or a professional e-commerce site, high-quality images enhance user experience and make content more appealing. However, To Change Image Size In WordPress Blog Post is essential to maintain a fast and well-structured site.
WordPress provides multiple options for managing image sizes, allowing you to customize their appearance to fit your design. By understanding these settings, you can ensure your site remains visually appealing without compromising performance.
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In this article, we’ll explore WordPress’s default image sizes, explain how to adjust them and show you how to create custom image sizes for better control. Let’s begin!
Upload Images in WordPress
Before discussing image size options, let’s quickly review how to upload photos to your WordPress site. The intuitive Block Editor allows you to insert images directly into posts and pages.

To do this:
- Click on the plus sign (+) within a post or page.
- Select the Image block.
- Choose Upload to add a new image or Media Library to select an existing one.
Alternatively, you can upload images in bulk by navigating to Media > Add New in the WordPress dashboard. Every uploaded Image is stored in the Media Library, making it easier to manage and edit photos later.

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Understanding Default WordPress Image Sizes
WordPress automatically generates different sizes whenever you upload an image to optimize performance and flexibility. Here are the default options:
- Thumbnail – 150px by 150px
- Medium – Up to 300px wide and tall
- Large – Up to 1024px wide and tall
- Full Size – The original image dimensions
You can choose an image size by selecting the uploaded photo in your post and adjusting the Image Size dropdown in the settings panel.

Each size serves a purpose:
- Thumbnails appear in blog feeds or as featured images.
- Medium-sized images work well in content sections where you need smaller visuals.
- Large images are ideal for highlighting details in blog posts.
- Full-size images ensure maximum resolution and clarity.
Choosing the right size helps balance visual appeal with site performance. Using large, high-resolution images without compression may slow down your website.

Cropping Images in WordPress
If your images don’t fit the desired dimensions, you can crop them directly in WordPress. Follow these steps:
- Select an image in your post and click the Crop icon.
- Use the Aspect Ratio tool to adjust the size.
- Define custom dimensions in the Image Dimensions section.
Alternatively, you can edit images from the Media Library:
- Navigate to Media and select the Image.
- Click Edit Image and Crop by dragging the frame’s corners.
- Save changes to overwrite the original Image.
Cropping images ensure they fit well within your site layout, but doing this manually for multiple images can be time-consuming. That’s where customizing default sizes can help.
Adjust Default Image Sizes
WordPress allows you to modify the predefined image sizes, making your workflow more efficient. To do this:
- Go to Settings > Media in your WordPress dashboard.
- Adjust the width and height for Thumbnail, Medium, and Large sizes.
- Click Save Changes to apply the new settings.
By setting custom sizes, you reduce the need for manual cropping and ensure your images fit your site design perfectly.
Adding Custom Image Sizes in WordPress
While WordPress provides default sizes, you may need additional variations to fit your website’s needs. The easiest way to add custom image sizes is using a plugin like Image Regenerate & Select Crop.
To create new image sizes:
- Install and activate the plugin.
- Navigate to Image Regenerate & Select Crop> Additional Sizes.
- Enter a name and set the width and height.
- Enable automatic cropping if needed.
- Click Save Changes.
Adding custom sizes eliminates the need to resize images manually and improves website consistency. However, too many image sizes can consume server space and affect site performance.
Choosing the Best Featured Image Size
Featured images are a key visual element in blog posts and page headers. However, the ideal dimensions depend on your theme’s layout. While there is no universal size, a width of 1222px to 628px often works well for most designs.
If your theme recommends a specific size, follow those guidelines to ensure consistency. You can also test different dimensions to find the perfect balance between quality and page load speed.
Final Thoughts
Optimizing images in WordPress enhances your website’s appearance and performance. By understanding default sizes, cropping tools, and customization options, you can ensure that your visuals always look sharp while maintaining fast load times.
Whether you’re a blogger or an e-commerce store owner, using the right image sizes will improve user engagement and site aesthetics. If you need more flexibility, consider adjusting default settings or adding custom image sizes for a tailored experience.
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