Seems to be Woocommerce related…
It may be that, but it would also be more. Every plugin and your theme can add image sizes that suit what it needs to display correctly. The only way of finding out is searching the code for where the image sizes are set up.
One option might be to use a plugin like Regenerate Thumbnails as that shows the full list of image sizes and names. From there you can deactivate plugins and swap to a default (Twenty *) theme and see which plugins/theme are adding the additional ones.
@catacaustic Thanks! I just confirmed that Woocommerce creates all those variations. I’ll test the plugin to see If I can get rid of some variations.
Yes, actually WooCommerce and Divi are responsibles for those variations. So I unregistred some variations, then used Regenerate Thumbnails to deleted unused variations. Of course, I tested on a staging site before 🙂