Short answers, pulled from the story.
Severny Island stands as the largest of all Arctic islands with an area of about 48,904 square kilometers. It ranks as Russia's second largest island after Sakhalin Island and claims the fourth spot among European islands.
The Russian Empire officially claimed the northern Arctic islands on the 20th of September 1916. A Note of the Russian Government listed Henrietta, Jeannette, Bennett, Herald, Edinenie, New Siberia, Wrangel, Novaya Zemlya, Kolguev, Vaigach, and others under state control.
These landmasses sit entirely within the Arctic Circle and scatter through six marginal seas of the Arctic Ocean. The Barents Sea, Kara Sea, Laptev Sea, East Siberian Sea, Chukchi Sea, and Bering Sea hold these territories.
Franz Josef Land itself covers about 16,134 square kilometers and includes Graham Bell Island at roughly 1,400 square kilometers. Alexandra Land measures around 16,134 square kilometers while Hall Island reaches about 1,400 square kilometers.
Wrangel Island covers 7,866 square kilometers near the Chukchi Sea and protects rare species like the walrus and narwhal. Medvezhyi Islands host polar bear populations that migrate across the region while Ayon Island supports breeding grounds for seabirds during summer months.