The Dutch islands have an area of 405.2 km² and have 24,184 residents.
Each of the five islands is located in a municipality of the same name. Texel belongs to Noord-Holland, the others since 1942 to Friesland. VAST provides for closer, formal cooperation between the Frisian Wadden Islands. 
In the Netherlands ‘TVTAS’ is often used as a donkey bridge to remember the names of the Wadden Islands. The Dutch Wadden Islands are called West Frisian Inseln in German. The literal translation of this (West Frisian Islands) is not common in Dutch.