Feature:1. Only 2.28 inches. This thermometer can be used not only as an interior decoration, but also as a tool for outings2. Aluminum alloy outer ring, glass mirror, aluminum dial and hands. These highquality materials make our hygrometer more durable3. The wall hole design makes this thermometer and hygrometer fit the wall, or it can be placed directly on the table4. Can be placed on the wall, tables, refrigerators, doors, freezers, greenhouses, terrariums, cars, baby rooms, etc. as measuring tools5. Accurately display high, low temperature and humidity, and record the changes of temperature and humidity at all timesSpecification:Item Type: Indoor ThermometerOuter Ring Material: Aluminum AlloyMirror Material: GlassProduct Size: Approx. D58 x 13mm / D2.28 x 0.51in.Package List:1 x Indoor ThermometerNote:Please allow 02 cm error due to manual measurement. Thanks for your understanding.