How much space is required for STATSPACK

Hello All,
I am trying to install the statspack utility by assigning PERFSTAT user to a locally managed tablespace of size 500 MB, it is giving me the following error

create table STATS$LEVEL_DESCRIPTION *
ERROR at line 1:
ORA-01658: unable to create INITIAL extent for segment in tablespace CCXSTL01 Would like to know , how much space is required for this. Thanks,
Madhu V Reddy
Database Support Services
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