PI 7.1 EHP1 : IDoc packaging

Guys

I am currently on PI 7.1 EHP1 , Trying to do Idoc packaging for one scenario , I am not sure what size I have to put in the tab

( IDoc package size ) in sender IDoc channel . I also donot know the frequency of IDocs . I saw one video in it it was told that the package size shouldnot exceed 2MB size .

Please help in this regard

Regards

Ninad