The file 'Embroidery Thread Bobbin 3D Printer Model' is (stl) file type, size is 2.9KB.
My wife asked if I could print her a bunch of bobbins for her emroidery thread (she has about 200 colors from some giant batch she ordered online). She gave me a bobbin to use as a template. Five minutes with a digital caliper and TinkerCAD, and here we are. I recommend 100% infill as it is only 1mm thick -- I doubt you could convince your slicer to use less filament if you tried to print at a lower infill anyway.
By measurement, this is a perfect match to whatever brand bobbin my wife handed me. Best of luck!
Embroidery_Thread_Bobbin_From_Scratch.stl | 15.7KB |