PenciDesign Supporter replied
Hi,
1. You can manage all the image sizes by going to Appearance → Customize → General → Manage Image Sizes,
2. Generally, you shouldn't disable any image sizes because Soledad contains numerous post layouts, each requiring unique image sizes. You can use the Media Cleaner plugin to save storage space: https://wordpress.org/plugins/media-cleaner/
Regards,
PenciDesign.