noun / verb
ribbon
RIB-uhn/ˈrɪbən/
A long, narrow strip of material.
A red ribbon forms a bow around the gift.

Etymology
Old French ruban names the ribbon, but its deeper origin is unknown. In English, the word first meant a stripe in material, then a separate narrow woven band used for ornament or other purposes.
In context
The knocker has been wrapped in black ribbon.