Oura Ring 4 brings you closer to what matters most - your health. With an updated all-titanium design, this smart ring features Smart Sensing, a new sensing platform that doesn't just measure your biometrics but also adapts to you. It provides insights into over 50 biometrics including sleep, readiness, activity, heart health, stress, metabolic health and women's health. SIZE 9 Lightly used- please see photos! Very little if any scratch! Truly like new! This was my personal ring and well cared for. Sorry no box