Made these so my mother could attach flowers to one of her cakes. I believe it can also be used for other stuff. Scale according to your needs.

Printing tips (Mini):

• 0% cooling
• Low layer height (0.08-0.12mm)
• Best printed with 0.4mm nozzle (though I used a 0.6mm one)

Printing tips (Medium):

• 2-3 walls should be enough
• Infill should be avoided, as it could compromise the clip's springiness

Printing tips (Large):

• Infill may be necessary to support top layers. Concentric is a nice option.
• Low layer height isn't necessary (printed mine at 0.28mm)
• For more stiffness, add extra perimeters in your slicer.