Reply To: Issue of image sizes

Hi there,

WordPress uses SRCSET for handing image sizes. So if you upload a 2048px image this is saved, it then creates the Large, Medium and Thumbnail sizes. The site will then display the most appropriate sized images for its needs.

You can change the media sizes in Settings > Media to suit your needs. This will then apply to any images you upload. Any existing images on the site will need to be regenerated, using a plugin like this:

https://en-gb.wordpress.org/plugins/regenerate-thumbnails/