Will something like this do?
SQL> SELECT TO_CHAR(first_time, 'DD-MON-YY HH24:MI:SS') AS "From",
2 TO_CHAR(next_time, 'DD-MON-YY HH24:MI:SS') AS "To",
3 blocks*block_size AS "Bytes"
4 FROM v$archived_log
5 /
From To Bytes
------------------ ------------------ ----------
22-SEP-06 10:10:25 22-SEP-06 10:34:10 10008576
22-SEP-06 10:34:10 22-SEP-06 10:34:16 6656
22-SEP-06 10:34:16 22-SEP-06 10:35:35 10569216
22-SEP-06 10:35:35 22-SEP-06 10:41:39 50049024
22-SEP-06 10:41:39 22-SEP-06 10:49:50 50049024
22-SEP-06 10:49:50 22-SEP-06 11:00:45 1704448
22-SEP-06 11:00:45 22-SEP-06 11:29:48 17866752
22-SEP-06 11:29:48 22-SEP-06 12:14:06 11990528
22-SEP-06 12:14:06 22-SEP-06 13:18:40 10932224
22-SEP-06 13:18:40 22-SEP-06 13:24:29 5315584