For the ESWD work it is a common question: How can you best estimate and rate the hail size based on photo evidence. The most typical type of hail image is a photo of a person holding a hail stone in the hand.
![](https://www.essl.org/cms/wp-content/uploads/DSC01202-1024x768.jpg)
Therefore the ESWD team around Thilo Kühne compiled a new hail size comparison table. It allows to estimate the hail size in centimeters based on different comparable objects.
![](https://www.essl.org/cms/wp-content/uploads/hail-size-example-hand.png)