Zazzle's latest blog post (August 2015) about the new store banners is confusing. No matter how I create a banner, it doesn't look sharp. In their blog they ask us to make a banner that is relevant to the store theme. Their example banners are very nice and contain images of products. In order to make a banner like that, do I need to buy products from my store? It looks like they took a photo and then sized it for the store banner.
Although Zazzle says "think about showing an array of your products" in their Creating a Great-Looking Banner post, I don't know how to do this without having the actual products in front of me. We also shouldn't put any text in the banner image because different screen views will re-size the banner.
Suggested size is a little greater than 1140x315 pixels. Huh? So my collections banners are exactly that size and they seem to fit okay. The store banners are trickier because our store icon sits to the left side and partially blocks the header. I think the suggestion to go a bit larger than specified is because now the banners can be cropped, so making them a big larger gives us more room to 'play' with the image once we load it up to the Zazzle site.
The store banners have a gradient gray background, which Zazzle says will help the little store icon at the side stand out. I don't really like the gray at the bottom, but we must deal with it.
I'm re-doing this page to keep up with Zazzle's ever-changing platform.