Olde Mappe which rather exaggerates the islandness of it all. The real current island is much more embedded and connected with the coast, so that it is hard to see where the Mainland ends and Island begins until you zoom in to the places where roads appear to join the two. The explanatory cartoon below shows the tortuous coastline of today; albeit totally detaching the island from the continent for clarity. The pinkish slash about midway indicates the border between German & Polish Pomerania that would be Mecklenburg-Vorpommern \\ Województwo zachodniopomorskie.
I've taken the liberty of indicating Stettin = Szczecin on the upper map. Why? Because it boggles my mind how a town so far from actual Baltic could have become such a major player in the Hanseatic League. An indication of its importance / desirability is the fact that, after being founded by Wends in the late 700s, it was successive part of Poland, Saxony, the Holy Roman Empire, Greater Denmark, Sweden, Prussia, Germany and most recently Poland.