The cutter is made for creating ear studs(or whatever you want) from polymer clay. I print this cutter with FDM printer using a strong PLA( ESUN, Sunlu, not metallic) To create a pair of mirrored earrings I printed also a mirrored version.
Heart size: 3.8x4.5cm
Here are the settings for getting a really sharp edge:
Layer height: 0.4mm Wall line count: 1 Top/bottom: 10mm Temperature depends on your filament. Speed: 40 Spiralize outer contour
Happy Printing!