Made of K10YG (10 karat yellow gold) Approximate dimensions: Wire diameter 0.5mm Outer diameter 3.0mm #K10 round ring yu #K10 round ring 3.0yu Solid 10 karat gold #K10 material yu ♦︎ Not a plated product! ♦️ 2 pieces available for immediate purchase ☆ Perfect for handmade accessories! The 3.0 x 0.5 size is versatile and can be used in many ways. ☆ Can also be used as a round ring for making interchangeable charms for earrings and piercings. ^ ^ ☆ Please feel free to contact me for inquiries about the number of pieces. Thank you very much. m(._.)m