American Size: 7.8.9.10.11.12 Quantity:1pc Material: stainless steel Gender:woman,men Applicale Occasion:party,wedding,pub,club,daily jewelry,gifts etc. Conversion:1 mm=0.0394inch 1inch=25.4mm ATT: 1. Please note the photo does not show actual size, please refer to Description for size details. 2. Please allowed 1-5mm differences due to manual measurement, thanks. 3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.Thank you! Package includes:1pc * Ring Size 6 = Internal diameter 17mm Size 7 = Internal diameter 18mm Size 8 = Internal diameter 19mm Size 9 = Internal diameter 20mm Size 10 = Internal diameter 21mm Size 11 = Internal diameter 22mm Size 12 = Internal diameter 23mm Yes, about the actual temperature: I have 35 degrees, although the body temperature is 36,6 and this is natural! T. K. The design of the ring uses a standard thermal tape of thermal releases, without any calibration and amendments to the fact that the ring on the inside is heated by the surface of the skin of the finger (which is already below the body temperature) and outside-dissipates the temperature into the environment. So the ring is not an active wearable real-time thermometer, but a keychain is a thermometer that needs to be immersed in the measured environment. You want to measure the temperature in the room-take off the ring and leave for 10 minutes to lie down. You want to measure the body temperature-put the armpit for 2-3 minutes, you can measure the water temperature in the baby bath (reacts quickly, in a few seconds). So almost is a rough thermometer, which is always at hand) use correctly. - When you wear a ring on your finger for 20-30 seconds, it automatically displays the ceramic with temperature. -- Each mood ring is made of durable stainless steel. The temperature display ring is highly resistant to oxidation, rust and corrosion. -- The inner arc of the ring is smooth, comfortable to wear, not sensitive, wear skin-friendly -- This is the ideal gift for Valentine's Day, birthdays, anniversaries, Christmas, Thanksgiving, etc., to express your best wishes and a perfect replacement for wedding rings. Style couple ring. 100% high quality titanium steel - never fade Titanium steel stainless steel jewelry does not dim and oxidize, so it can be more durable than other jewelry. It can withstand a lot of wear and tear. And the sensitization is very low. These advantages make it a more popular accessory. High quality stainless steel is very resistant to rust, corrosion and darkening, so it requires little maintenance. Wear-resistant, never fade, more comfortable to wear The price is cheap. If you need two rings, buy two rings. Emotions can change the warmth of the ring - Valentine's Day special gift Valentine's Day best gift or wedding The unique functional temperature of the ring changed the mood. Let him be crazy. These ring thermometers. They use heat together to change the temperature of their fingers. Your body temperature changes as you ascend or descend. Just like a thermometer. Style couple ring. 100% high quality titanium steel - never fade Titanium steel stainless steel jewelry does not dim and oxidize, so it can be more durable than other jewelry. It can withstand a lot of wear and tear. And the sensitization is very low. These advantages make it a more popular accessory. High quality stainless steel is very resistant to rust, corrosion and darkening, so it requires little maintenance. Wear-resistant, never fade, more comfortable to wear