Description:The ring will change color according to the temperature of your body, it is very funny and amazing.Its delicate design make it can as a gift for your friends and your lover.Made of high quality material, it is durable and comfortable.There are six sizes to choose from: A (Inner Diameter 16mm), B (Inner Diameter 17mm), C (Inner Diameter 18mm), D (Inner Diameter 19mm), E (Inner Diameter 20mm) and F (Inner Diameter 21mm).It is suitable for club, party, daily life, anniversary and dating.Item Name: RingMaterial:Stainless SteelSize Details:A (Inner Diameter 16mm) Length: 1.6cm, Width: 1.6cm, Height: 0.6cm (Approx.)B (Inner Diameter 17mm) Length: 1.7cm, Width: 1.7cm, Height: 0.6cm (Approx.)C (Inner Diameter 18mm) Length: 1.8cm, Width: 1.8cm, Height: 0.6cm (Approx.)D (Inner Diameter 19mm) Length: 1.9cm, Width: 1.9cm, Height: 0.6cm (Approx.)E (Inner Diameter 20mm) Length: 2.0cm, Width: 2.0cm, Height: 0.6cm (Approx.)F (Inner Diameter 21mm) Length: 2.1cm, Width: 2.1cm, Height: 0.6cm (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.Package Includes:1 X Ring