Based on a sketch for our son we have designed this easy to print necklace.
You can use a colour marker to highlight contours.
Infill 100 % or enough top/bottom layers.
Smaller nozzle (<0.4 mm) recommended.
Use ironing for better top surface.
Required print area 143,0x168,8x4,1 mm.
I used ST-PLA - it should be less brittle.
The author hasn't provided the model origin yet.