Divina – Post Featured Image Size

Hi,

I’m using the Divina them, which has recent posts arranged on the right hand side. When I set a featured image, this image shows up along with a link to the post. Problem is, one image is sized much larger than the others and I can’t figure out why.

Site is here to have a look: https://www.aliastephen.com

The featured image for this post is exact the same size as all the others. I’ve tried this:

– I’ve changed the image. If I change it to some images, it resizes to the same as all the others. With others, it stays the same: same width as the others but taller.
– I’ve resized the image to make it smaller, and cropped it so it’s the same width but shorter. No change.
– I’ve removed the image so there is no featured image, and the box is just a solid colour. Still the taller size.
– I’ve taken one of the images that works, and, in photoshop, pasted the new one over it and re-saved so it should definitely be the same size. No change.
– Made a new post with the same name and repeated these steps. The new post has the same problem.

Can anyone figure out why it’s doing this? I’m not skilled in CSS. I have managed to change a few things but mainly by trial and error, and I have no idea what to look for in stylesheet for this.

I have checked in both Safari and Chrome and the issue is in both.