How to find the definition of a User-Defined Table Type

SELECT c.name, st.name, c.is_nullable, c.max_length, c.precision, c.scale

       FROM sys.columns c INNER JOIN sys.table_types tt

                          ON c.object_id = tt.type_table_object_id

                          INNER JOIN sys.types st

                          ON c.system_type_id = st.system_type_id

       WHERE tt.name = '{Insert Type Name Here}';