8mm with white adjustable-knot. The length from tip of guru-bead to end is approximately 15″.
Quartz crystal is reputed to cleanse the mind-body and to receive, transmit, store & amplify energy. It is particularly beneficial for meditation & healing work. In Buddhism, quart crystal is associated especially with Avalokitesvara/Chenrezik and thus is most appropriate for counting the mani-mantra of universdal compassion.