Unable to answer "What diameter is specified on the sign for this fire hydrant?" for https://osm.org/node/10678289070 via StreetComplete 52.1:

Not sure how to answer this. Also not even sure it is correct?

Attached photo(s):
https://westnordost.de/p/146445.jpg
https://westnordost.de/p/146446.jpg
https://westnordost.de/p/146447.jpg