12 Pieces spiky sensory finger rings, spiky finger ring/ acupressure ring set for teens, adults, silent stress reducer and massager Features: To provide enough pressure, the diameter of our rings will be slightly smaller than your fingers These finger massager rings can help promote finger blood circulation, reduce stress/ anxiety, increase attention, etc. The massage ring is very small and easy to carry Specification: Material: stainless steel Color: as the picture shown Size: approx. 2.5 cm/ 0.98 inch in diameter Package includes: 12 x Massage rings Note: Light and small objects, not suitable for children under 3 years old.