Feature: 1. Only 2.28 inches. This thermometer can be used not only as an interior decoration, but also as a tool for outings 2. Aluminum alloy outer ring, glass mirror, aluminum dial and hands. These high‑quality materials make our hygrometer more 3. The wall hole design makes this thermometer and hygrometer fit the wall, or it can be placed directly on the table 4. Can be placed on the wall, tables, refrigerators, doors, zers, greenhouses, terrariums, cars, baby rooms, etc. as measuring tools 5. Accurately display high, low temperature and humidity, and record the changes of temperature and humidity at all times Specification: Item Type: Indoor Thermometer Outer Ring Material: Aluminum Alloy Mirror Material: Glass Product Size: Approx. D58 x 13mm / D2.28 x 0.51in Package List: 1 x Indoor Thermometer Note: Please allow 0‑2 cm error due to manual measurement. Thanks for your understanding.