For example:

This lovely wrist mala bracelet is made with 8 mm or 10mm lava rock beads, 10 mm Silver Tibetan Guru bead, and 6 mm Lava rock beads pull ends. With an adjustable slide cobra knot. The Sliding knot closure makes the mala flexible approx 1.5 inches to allow going over the hand.

18 or 21-bead mala bracelet is a miniature, wrist-worn version of its larger counterpart, the 108-bead mala necklace. Perfect for beginners.