I'll be adding to this post later this weekend, but I'm uploading all my calendar subway art... (sometimes I use my own in my decorating, sometimes I use the ones from Eighteen25, or from other places). More are coming-these are done in PhotoShop Elements.
Here is the Google Doc with the large files where you can download them. They will print as big as 8x10. If you need a larger file, just let me know.