How to know the size of archived logs created under ASM

I using Oracle 10g on Linux x86-64.
I need to ship the archived logs(not the entire directory, only a few) from the Live database to the DR site, so I need an estimate of how much time it will take to ship them across the network ?
Is there anyway I can know the size of a specific archived log file stored under ASM ?
We can use du in ASM to know the size of directory but I dont find a command in ASM to get the size of a file ?

No we are also switching logfiles manually , so the maximum size may not
have reached.
What I need is something like ls -l command in the Unix prompt which will
help us to find the size of the file , a similar command to help us determine
a size of file in ASM ?What is the objective?
Anyways, you can get the size of an archived log file by quering V$ARCHIVED_LOG view.
SQL> select sequence#, name, blocks*block_size from v$archived_log where sequence# > 180;
SEQUENCE# NAME                                     BLOCKS*BLOCK_SIZE
       182 C:\MYDB\ARCH\ARC00182_0633314306.001             223053312
       181 C:\MYDB\ARCH\ARC00181_0633314306.001             264281600
       183 C:\MYDB\ARCH\ARC00183_0633314306.001              26209280
       184 C:\MYDB\ARCH\ARC00184_0633314306.001                  4096
       185 C:\MYDB\ARCH\ARC00185_0633314306.001                 16384
SQL>

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