This is a functional 3D model of the Cosmic Heart Compact brooch from the anime Sailor Moon. The brooch is designed to open and close just like in the series. It comes with two interior versions:

One with a fixed heart inside

One with a compartment to insert a separate heart piece (included as a separate file)

The hinge system is designed for easy assembly. Instead of printing a separate hinge pin, you can use a standard 1.75 mm filament piece as a pin to connect the two halves of the brooch.

The intended final size of the brooch is approximately 10 cm in diameter, making it ideal for cosplay, display, or collection.

The model is optimized for FDM and SLA 3D printing. All parts are separated for better printability.

If you’d like to see more models from this anime – check out my profile, the collection is growing!