Product Number: 100-27528 Product Name: One Ear Mens Feather Feather Material: K18 Body Size: Main Body 0.5 x 0.2 inches (14 x 5 mm), Hoop Diameter 0.4 inches (10 mm), Thickness 0.06 inches (1.5 mm), Delivery Time: 2 to 4 business days.