Material: 925 Sterling Silver + Switzerland Cubic Zirconia Rings Quality Assurance: This ring is made of highest quality 925 Sterling Silver， negative ion plating technology used which makes this ring never fade， retains shine and is anti-allergic Accessory: Jewelry Box included (Random color and design for jewelry box will be included with rings set)  Ring Top Width: 4mm   Defaultl Engraved Text: Promise (Default engraving can not be changed or removed)   Please mention engraving text the ring. engraving text should not exceed 10 letters including spaces. Custom engraving will be done on inside part of ring. Once you place an order then please open support ticket to provide us engraving text， if no engraving text provided within 10 minutes after placing an order then ring will be shipped without engraving and we will not be responsible for non-engraving of items.   RING SIZES ARE MENTIONED IN US (AMERICAN SIZES). If you do not know your ring size please use this link to measure: http://www.gullei.com/measure-ring-size/