In HO (1:87) scale. As translated from the nmj newsletter: "We got a shipment of little goodies from Artitec at the end of last week. Among the items that came was the long-awaited coaster "Noordborg". This North Sea boat has been to Norway several times and is a classic.
"Very slender model with the hull cast in one piece: the boat is over 50 cm long! An eye-catcher."
Accordingly, the original must be around 44 metres (143 ft) long.