These are Chun Li's Bracelets. They are printed in two halves and can be attached with pins. I have also included a "key" which can be used to punch the pins out when taking them off. The spikes are actually very sharp, so I recommend using flexible filament when printing them.
The interior diameter of the bracelets is 60mm (~2.4in). If you need larger or smaller bracelets, scale all of the pieces based off of that.
I printed these in multiple prints, 3 spikes at a time, 2 pins at a time, and 1 bracelet half at a time. It took around 30 hours of printing in PLA and flexible TPU on an Ender 3.
Post-printing, glue the spikes into each half.