An elegant and easy to print collar. The included zip has eight sets of .stl files, for neck circumferences from 12to 17 (30-44cm). Simply measure the circumference of the wearer's neck and choose the next size up to print. The files will print easily on a bed at least 220 x 220mm. My example collar pictured was printed in silver silk PLA at the 13.5" size.
The files include a pdf with detailed instructions on how to measure for sizing, and print settings I successfully used for each part, and the minimal post-processing applied (light sanding of the sections with supports. Also included is the fusion360 design file if you wish to modify the collar.
The collar locks with a luggage sized padlock. I personally recommend the masterlock 130D, as pictured.