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: Ring Material:Stainless Steel Size 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