Some of the main villages in Tromøy were Færvik, Brekka, Brattekleiv, Sandnes, Revesand, and Pusnes.

The official blazon is "Per fess nebuly argent and azure" (Norwegian: Delt av sølv og blått ved skysnitt).

This means the arms have a field (background) that is divided in half horizontally with a nebuly line.

The top part has a tincture of argent which means it is commonly colored white, but if it is made out of metal, then silver is used.

The design is meant to mimic the coastline near the village of Brekka, which is characterised by large rounded boulders protruding out into the sea.

This landscape dates back to the Ice Age and was used to model the division line in the coat of arms.