WordPress generates various image sizes for each picture you upload using Media size settings. The plugins and themes can also add additional media sizes. This is a really good feature because it helps your site load faster by loading smaller image sizes for post thumbnails.

But, if you remove those images or clean them using a plugin, then you will need to redirect old image sizes to the full size to keep your site functioning.

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Redirect Missing Image Sizes Using .htaccess

You can use the following htaccess code to redirect all your missing image sizes to full size.

# Fix for missing media sizes
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^wp-content/uploads/(.*)-\d{2,4}x\d{2,4}.jpg https://example.com/wp-content/uploads/$1.jpg [L,R=301,NC]
RewriteRule ^wp-content/uploads/(.*)-\d{2,4}x\d{2,4}.webp https://example.com/wp-content/uploads/$1.webp [L,R=301,NC]
RewriteRule ^wp-content/uploads/(.*)-\d{2,4}x\d{2,4}.png https://example.com/wp-content/uploads/$1.png [L,R=301,NC]
</IfModule>