These mala chokers are available in one size, but they are adjustable.
They close in three sizes corresponding to sizes small, medium, and large, with the chain extender.
When closed to the following sizes:
Small: 13.5 inches, it will sit high on your neck, or when worn as a bracelet it will fit a size small wrist.
Medium: 15 inches, it will sit lower on your neck, or when worn as a bracelet it will fit a size medium wrist.
Large: 16 inches, it will fit more as a super short necklace than a choker, and will also wrap to a size large wrist when worn in this size.
Bead size is 8mm.