This bracelet shape has lots of success. I've generated it from https://n-e-r-v-o-u-s.com/kinematicsHome/
100 % fill-in preferred for clip parts. 20 % makes it well for the rest. Clips sometimes don't print perfect so you may need to print them again but separately and replace. STL ("start" and "end" attached too)
The author hasn't provided the model origin yet.