Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4706062.
I loved the look of these Mermaid Corbels (I didn't even know what a "corbel" was before I saw these!) uploaded by @darkside501st but when I went to print them, all three threw up errors in Cura, with the left being the worst. The left model was turned completely inside out! I imported these into blender, cleaned them up the best I could, and then let netfabb do the rest. I would have preferred to get these down to a single shell, but ... you have to balance time and effort with results.
For the best quality, print these upside down with supports enabled. I prefer Tree Supports in Cura. They are easier to remove and leave fewer scars.
I wanted to use these on an 8" shelf I put up so I added a stretched version of each that extends the upper ledge by 54.5mm. Then I was able to scale it up in my slicer as large as I could go - about 6-1/2" long. I reckon I'll use either Gorilla Glue or Liquid Nails to attach them.
@tato_713 made a great suggestion... you could use these as bookends, too!