ISO 7736
Appearance
A "DIN" is a size standard for car audio head units. The standard was established by the Deutsches Institut für Normung.
Head units generally come in either single DIN (180 x 50 mm panel) or double DIN (180 x 100 mm panel). The depth is not standard. The original German DIN standard has, since 1992, been superseded by International Standard ISO 10599.
See also