Format
An allowed size (width and height combination) or Flex Ad parameters for a banner impression. Include multiple Format objects to declare multiple permitted sizes.
winteger
Width in device independent pixels (DIPS). FCC does not apply dimension-based filtering if absent.
Example:
30hinteger
Height in device independent pixels (DIPS). FCC does not apply dimension-based filtering if absent.
Example:
20Format
{
"w": 30,
"h": 20
}