Package contents: you will receive 12 spiky sensory finger rings in assorted colors, providing sufficient quantity for daily use; color selection allows for personal preference. Material and size: crafted from high-quality stainless steel with an anodized coating, these rings are durable, reusable, rust-resistant, and resistant to fading. The outer diameter of the massage ring is approximately 2.5 cm (0.98 inch), with an inner diameter of approximately 1.2 cm (0.47 inch), designed to fit most finger sizes. Function: these massage rings help reduce anxiety and relieve stress, while potentially promoting finger blood circulation; suitable for students, office workers, and individuals seeking sensory stimulation. Intended use: acupressure rings are designed for adults, teachers, students, therapists, and long-term computer users; ideal for individuals seeking stress relief. Usage instructions: place the ring on your finger and roll it up and down to create pressure for a massaging effect; the flexible design accommodates most finger sizes.