Shell diameter: 4.4cm<br>Shell Thickness:1cm<br>Strap width: 2cm<br>Total length: 24.5cm<br><img src="http://gdetail.image-gmkt.com/074/585/748585074/2017/3/4e985a3d-fa47-4c5f-8704-88a1d6872894.jpg">