Small medallions for thank you cards or gifts. I think they look like bubbles, but my brother thinks they look like cheese. I recommend scaling them up to about 45mm diameter (as shown in picture.) I used mine to thank those people who funded my 3D printer, as it shows what a 3D printer can do. So, they are perfect for kickstarters or Indiegogo! You can print them out very quickly. Also, the holes save plastic! :)