The Islands of the Firth of Clyde are the fifth largest of the major Scottish island groups after the Inner and Outer Hebrides, Orkney and Shetland. They are situated in the Firth of Clyde between Ayrshire and Argyll. There are about forty islands and skerries, of which only four are inhabited and only nine larger than . The largest and most populous are Arran and Bute, and Great Cumbrae and Holy Isle are also served by dedicated ferry routes. Unlike the four larger Scottish archipelagos, none of the isles in this group are connected to one another or to the mainland by bridges.