In terms of size, Flatey is some two kilometers long and about one kilometer wide, of which most is flat land (hence its name, meaning "flat island" in Icelandic), with scarcely any hills to be found.
The island of Flatey measures approximately two kilometers long and one kilometer wide. Most of the island is flat terrain, hence its name, which translates to "flat island" in Icelandic.  It has very few hills.