The answer is your imagination is the limit! They are small mini canvas covered buttons waiting for you to add your art. They are available in two types of canvas, regular and watercolor. 1.5 inch and 2.25inch buttons. Anything you can paint on a larger canvas can be painted on these (only smaller).
One talented Jewelry Artisan that creates beautiful wearable art is Connie Owens Art. She uses watercolors as one of her mediums to create one of a kind artisan jewelry. This beautiful leather southwest art bracelet is available in her Connie Owens Art on Etsy
Visit her Etsy Shop where you can find this beautiful Hummingbird Pendant Necklace Spring Colors, Hand Painted Original Art Pendant, Pin or Scarf Slide.
These are just two of her beautiful wearable art jewelry. The holidays are right around the corner. She also does commissioned work (get your orders in now-before the Holiday rush). She is a great person to work with.