Remove Null values from Concatenate string

Handling NuLL in a concatenated statement.

How do I remove any values containing "NULL".

I am trying to concatenate the Type and size into a single value, however, some of the size = "Null".

I want to remove the Null from the concatenated values.

TYPE       Size          Final value
varchar      8      NO      varchar(8)
varchar      10      NO      varchar(10)
datetime      NULL      NO      datetime(NULL)
varchar      40      YES      varchar(40)
varchar      50      YES      varchar(50)
varchar      25      YES      varchar(25)
varchar      25      YES      varchar(25)
varchar      17      YES      varchar(17)
varchar      50      YES      varchar(50)
varchar      40      YES      varchar(40)
varchar      40      YES      varchar(40)
varchar      10      YES      varchar(10)
varchar      36      YES      varchar(36)
varchar      36      YES      varchar(36)
datetime      NULL      YES      datetime(NULL)
datetime      NULL      YES      datetime(NULL)