Description:These rings can change color at different temperature according to your mood These color changing emotion rings are durable and nickel-free, and its smooth surface ensures comfortable wear It is durable and wearable There are 4 sizes to choose from: 6, 7, 8 5, 10 Best Choice for Birthday, Anniversary, Holidays, Stocking Stuffers, Graduation, Christmas, Valentine's Day, and any Other Occasion Item Name: Ring Material:Stainless steel Style: FashionSex: UnisexColor: Random ColorSize Details:Our Size 6: 16mm/0 63" (Approx )Our Size 8: 18mm/0 7" (Approx )Our Size 10: 20mm/0 78" (Approx )Our Size 12: 22mm/0 86" (Approx )Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures Please allow slight dimension difference due to different manual measurement