Hippie Greeting Cards. Your favorite Soul Flower art is now available on 5 x 7 inch hippie greeting cards (blank inside). These recycled paper greeting cards are digitally printed on 100% post-consumer recycled paper and come with a matching envelope. For a hippie card that is both eco-friendly and unique, take a closer look at these recycled paper cards. Looking for the perfect hippie gift? Grab a Soul Flower hippie greeting card and add a hippie sticker or a recycled notebook for perfect hippie vibes!