These wristlets are made from 20g of Thread and can be made in one evenig.
You can use any yarn or thread that is suitable for a US 1½ - 2.5 mm crochet Hook.

They are great for Halloween, Karneval or as a nice gift to someone who likes this style.

You should know how to:
Chain, single crochet, half double crochet, double crochet, treble crochet