Shamballa Macrame Bead Bracelet Gun Metal Grey Hematite Beads & Rhinestone Effect Beads The hematite beads measure approximately 10mm in diameter. Is fully adjustable from approximately 18 cm (7 inches) to approximately 24 cm (9.5 inches) in circumference, so will fit most wrist sizes. A beautiful piece of Shamballa Jewellery which can be worn by both men and women alike.