While the prior replies are very good general answers, if you wanted to directly find the size of just the second array in the AoA @A you could use  scalar(@{$a[1]}) where $a[1] is the reference to the second list and  @{$a[1]} deferences that to an array and  scalar(@{$a[1]}) takes the size of that.

edit: opps i should have replied to the OP and not a reply, sorry

2018-05-16 Athanasius reparented to OP

In reply to Re^2: Find number of items in a field multi-demensional array by huck
in thread Find number of items in a field of a multi-demensional array by msnyder424

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