DVD comes in two main physical sizes - 120mm (the same diameter as a CD) and 80mm - and in a variety of capacities from 1.36GB all the way up to 15.9GB.
Shown below are all the available formats with their physical sizes, number of sides and layers and approximate capacities (in GB and minutes).
DESCRIPTIONS OF FORMATS
DVD-1
80mm
Single Sided / Single Layered
1.36GB / 45 minutes
