Globally resizing images in my blog

Hello web designers!

I'm slowly getting there with my new website, with a lot of thanks to forum members' posts.

I now have a problem with images being too big on my blog. Is there a way I can globally change the image sizes or do I have to edit each post? I can't see anything in Design>Site Styles. The template I'm using is Brine. I'm happy with the image size elsewhere on my website.

My URL is https://johnbrewerphotography.com and blog is https://johnbrewerphotography.com/blog

Thanks in advance!

John

You can add this to Design > Custom CSS

.BlogItem>.sqs-layout .image-block {
    max-width: 750px;
}