Icicle decoration should print without supports. Supports may be used on the magnet holes if required. Space for (3) 12mm (1/2″) magnets to stick to a metal door frame, or just tape/command strip in place. Mine also stuck to the metal corner beads of unframed openings at my house & office.
Samples printed in white Hatchbox PLA on the Prusa MK3S+.
Link to the magnets I used: https://www.ebay.com/itm/192600935432
Credits:
fixumdude