Metal : High quality 18 Gauge M Steel. Inner Diameter : Front to back 8 inches (approx). Ear to Ear : 7 inches (approx). Height : 15 inches from top to bottom (approx). Circumference : 25.12 inches (approx).Size : standard size, fits almost all adults. Quality is a parameter where we make no compromises. Superior quality raw material is used in the manufacturing process. Quality check at each stage of manufacturing. Finally checked thoroughly before batch inception.