Advice Sought on Sizing log_archive_dest_1 for ArchiveLogs for switching production DB to archive lo

Planning to switch database to ArchiveLog mode and am trying to gauge proper sizing for Archive Logs

Query of Redo Log Space below returned a maximum of 400 GB of redo generated a day when some tables are loaded with NOLOGGING option. 

Daily Count and Size of Redo Log Space (Single Instance)
SQL> SELECT A.*,
Round(A.Count#*B.AVG#/1024/1024/1024) Daily_Avg_GB
FROM
(
SELECT
To_Char(First_Time,'YYYY-MM-DD') DAY,
Count(1) Count#,
Min(RECID) Min#,
Max(RECID) Max#
FROM
v$log_history
GROUP
BY To_Char(First_Time,'YYYY-MM-DD')
ORDER
BY 1 DESC
) A,
(
SELECT
Avg(BYTES) AVG#,
Count(1) Count#,
Max(BYTES) Max_Bytes,