Here are the three pillow designs that have sold from my store so far. You can see a theme emerging as far as what is popular. (I also see that with my iPhone cases and cards.) Two of these have a digitally collaged background of vintage Parisian and French ephemera, including an old invoice, receipt, handwritten letter, the handwritten manuscript of Madame Bovary, lovely typography and old stamps, with a number of the vintage images from Karen at the Graphics Fairy.
Paris Eiffel Tower Butterfly Pillow by 13MoonshineDesigns
Vintage Paris French Ephemera Pillow by 13MoonshineDesigns
Three of my other pillow designs were featured products on Zazzle, wining Today's Best Awards.
Sunflower Ancient Rome Italian Pillow by 13MoonshineDesigns
And just a couple of days ago:
Vintage French Floral Dress Forms Pillow by 13MoonshineDesigns
I have actually designed 49 pillows that are available in my store.
If you are a Zazzle designer who has sold any pillows, add a comment to my post with a link to your best selling pillow design.