We suggest that blogs have at least three photos. This helps make the post interesting. You can also have a slide show of up to 12 pics. All pics display at 400 px wide. When viewed in lightbox, the pics can’t exceed 1024 px wide or 700 px high.
We also like our blog posts to have a banner. Our standard banner for a blog is 1950 x 250. We also use 1950 x 400 in a banner compressed to 250 px high.