Mandala Crafts Dark Brown Yak Bone Skull Beads, 50 pcs Every box of yak bone beads is marked with Mandala Crafts. Mandala Crafts, a trademark solely owned by Mandala Trading Inc., is the only distributor of Mandala Crafts. Made of Yak Bone Size: .5 x .3 inches, Hole Size: 1.7mm, There is a horizontal and also a vertical hole in each of the beads. Lot of 50 Yak Bone Skull Beads Perfect for making skull bead jewelry or skull malas