SQL> select name,block_size,file_size_blks from v$controlfile;
NAME                           BLOCK_SIZE FILE_SIZE_BLKS
------------------------------ ---------- --------------
C:ORACLEPRODUCT10.2.0ORADA      16384            450
TAORCLCONTROLFILEO1_MF_390M
ZRBL_.CTL
SQL> show parameter block_size;
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
db_block_size                        integer     8192
SQL> select name,block_size from v$datafile;

NAME                           BLOCK_SIZE
------------------------------ ----------
C:ORACLEPRODUCT10.2.0ORADA       8192

TAORCLDATAFILEO1_MF_SYSTEM_

390N2CK3_.DBF
C:ORACLEPRODUCT10.2.0ORADA       8192

TAORCLDATAFILEO1_MF_UNDOTBS

1_390N2D0W_.DBF
C:ORACLEPRODUCT10.2.0ORADA       8192

TAORCLDATAFILEO1_MF_SYSAUX_

390N2CW2_.DBF
NAME                           BLOCK_SIZE

------------------------------ ----------
C:ORACLEPRODUCT10.2.0ORADA       8192

TAORCLDATAFILEO1_MF_TEST_39

0N2DBX_.DBF
C:ORACLEPRODUCT10.2.0ORADA       8192

TAORCLDATAFILEO1_MF_DEFAULT

__390N2DJK_.DBF
C:ORACLEPRODUCT10.2.0DBDAT       8192

AORCLDATAFILEO1_MF_TEST100_
NAME                          BLOCK_SIZE
------------------------------ ----------
3BYJR6R3_.DBF
C:DUL.DBF                           8192
7 rows selected.
SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod
PL/SQL Release 10.2.0.3.0 - Production
CORE    10.2.0.3.0      Production
TNS for 32-bit Windows: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 -