Size... Please measure your finger circumference using (inner diameter) x 3.14 Size 12 (inner diameter 1.68) Size 19 (inner diameter 1.94) Size 21 (inner diameter 1.98) Overall length... 1.68cm, width 1.6cm Emerald crystal... Length 8mm, width 1.36.4mm The surrounding material is crystal glass (not cubic zirconia) I also have other items on sale at great prices. If you purchase multiple items and ship them together, you will receive a discount of 100 yen off each item from the second item onwards. Items under 500 yen will receive a 50 yen discount. Overseas fashion Import Korean fashion Ulzzang Trend Stylish Cute Adult fashion Adult casual Elegant Party dress Wedding Second party Presentation Farewell party Concert Dress One-piece Sweater Scarf Party Formal Jewelry Cubic zirconia Crystal Jewelry Ruby Sapphire Emerald Opal Ring Necklace Bracelet Anklet Pinky ring White sapphire Carat Gorgeous 1080 Luxurious Christmas Present Birthday Valentine's Day White Day Healing