necklace
A necklace
boy
The answer to "neck is to scarf" is "waist is to belt." Just as a scarf is worn around the neck, a belt is worn around the waist.
scarf
Typically, an ascot is worn around the neck.
tie
scarf
a tie
tie
A wimple is a cloth which covers the head and is worn around the neck and chin, worn by nuns in certain orders.
If you mean something from Polynesian culture, they are sometimes worn as a good luck charm, a pendant around the neck
A Bandana