Image Sizing Problems

Hello!

I have built a series of ‘archive’ pages on my site that originally displayed a ‘medium’ sized version of a poster at the top, but it has suddenly become enormous despite displaying at a normal size in the draft and preview. The problem may have begun when I started using an image optimizer, but even with it deactivated the problem persists and I’m unable to alter the size the image is displayed at.

Thanks in advance!

• This topic was modified 4 years, 10 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Everything else WordPress topic

The page I need help with: [log in to see the link]