I have a problem with some images.
This is my site: http://derastrillosybazares.com/
I used square photos with the old template. Since I installed the blogger the new thumbnails are being cropped to a recctangle format.
I’ve tried to regenerate the thumbnials with the “regenerate thumbnails” plugin but it doesn’t work.
It seems that the template is using a different thumbnail: theblogger_image_size_4: 550×362 píxeles (recorte exacto) IMG-20180106-WA0017-550×362.jpg
But I need to use a square format like: theblogger_image_size_3: 550×550 píxeles (recorte exacto) IMG-20180106-WA0017-550×550.jpg
Hi, When I check your related url, I see that the original of the photo is not rectangular. Some photographs are displayed as rectangles. So there is no mistake in the thumbnails. I would recommend you to upload a fresh copy of the featured image. Mostly, regenerate plugin is handling this request smoothly.