Three Keys Jewelry 8MM 6MM Black Ceramic Wedding Ring with Koa Wood Inlay Flat Wedding Band Ring Material: Ceramic - Scratch Resistant, No Metal Irritation or Color Fading; Koa Wood Inlay - Represent Integrity & Strength, Sensitivity & Protection in Marriage Craft: Black Ceramic & Koa Wood Inlay (resin applied over the wood to make it waterproof & durable) Ring Width: 8mm / 6mm; Ring Thickness: 2.4mm; Comfort Fit Design and Lightweight (pls check correct ring size in 6th pic) Idea Wedding Band, Engagement Ring, Promise Ring for Men and Women. Best Gift for Him, Husband, Dad, Boyfriend & Gift for Her as well Comes with Free Charming Ring Box. Perfect Gift for Father's Day, Anniversary, Graduation, Christmas, Birthday, Wedding, Engagement, or Valentine's Day Gift