SQL & PL/SQL :: How To Describe Number Length In VIEW

in the case below, when i created VIEW to add a new Department for some reason, its length is un-identified but i want the length as describe in table, how i can get ?

Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Production With the Partitioning, OLAP and Data Mining options

devtest@ Test.DB> desc dept
Name Null? Type
----------------------------------------------------------------- -------- ------------
DEPTNO NUMBER(2)
DNAME VARCHAR2(14)
LOC VARCHAR2(13)

devtest@ Test.DB> l
1 select deptno, dname, loc from dept
2 union all
3 select 99 deptno, 'MY DEPTT' dname, 'MY LOCATION' LOC
4* from dual
devtest@ Test.DB> create view my_dept as
2 select deptno, dname, loc from dept
3 union all
4 select 99 deptno, 'MY DEPTT' dname, 'MY LOCATION' LOC
5 from dual;
[code]....