- Material: Steel.- Main Stone:High quality zircon.- Zircon Grade:AAAAA.The product is made of steel, style for Nickel-free, Lead-free, Cadmium-free, Hypoallergenic. Quality Assurance, Comfortable to wear, Not harmful for your health.- Weight: 2.1g.- Size: Length: Normal Inner Diameter 17.6mm(around); About 2-3cm (adjustable).- Suitable for all women.- Applicable occasions: Party/Anniversary / Daily /Casual / Gift. - Ideal Gifts: 1 Piece * Rings. 1* Jewelry Gift Box.