These are simple stitch markers to keep track of your work. One colour so they print easily and quickly! 

They can be put on jump rings as I have, or other markers you may have around! 

I have printed these on my P1S with PLA Basic, and the Cool plate Supertack as I love the smooth surfaces. I recommend ironing the top surfaces for a better result!

The magenta markers were printed at 100%, and the bright green markers were printed at 120% if you want a different size!