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Sizes needed by theme ?

Thumbnail Manager · support · 2026-05-04T21:11:00+00:00

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revixi5 resolved
Your plugin seems great, except that I only see the default WordPress image sizes in the options… Does your plugin detect and include the custom sizes required by the theme being used? Usually, there’s a “scan” option to list all existing sizes generated by the various themes used over the years (so you can then clean them up and update them). Thanks. Good question — and yes, the plugin does detect custom image sizes, but there’s an important detail about how WordPress works. The plugin lists all currently registered image sizes , including those added by your theme or other plugins. However, WordPress only exposes sizes that are actively registered at runtime. So if a theme previously created custom sizes but is no longer active, those sizes won’t appear in the list — even though the actual image files may still exist in your uploads folder. Unlike some tools, there isn’t a native “scan all historical sizes” feature in WordPress, since it doesn’t keep a global record of past image sizes — only what’s currently registered.

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Jacob 2026-05-05T04:52:00+00:00

Good question — and yes, the plugin does detect custom image sizes, but there’s an important detail about how WordPress works. The plugin lists all currently registered image sizes , including those added by your theme or other plugins. However, WordPress only exposes sizes that are actively registered at runtime. So if a theme previously created custom sizes but is no longer active, those sizes won’t appear in the list — even though the actual image files may still exist in your uploads folder. Unlike some tools, there isn’t a native “scan all historical sizes” feature in WordPress, since it doesn’t keep a global record of past image sizes — only what’s currently registered.