Length

Define the internal or stored size of the column. The size is based on the data type.

Data Type	Size
Character String	Up to 32,767 bytes.
Numeric	Up to 32,767 bytes.
Integer	1, 2, 3, or 4 bytes.
Unsigned integer	1, 2, 3, or 4 bytes.
IEEE float	N/A (always 8 bytes).
BCD float	N/A (always 8 bytes).
Business math	N/A (always 8 bytes).
C float	N/A (always 4 bytes).
C double	N/A (always 8 bytes).