I'm sorry, but you are still not clear. Do you want the 'inner' of the 'outer' length?

1. If you want the inner length (first dimension), just skip the sub and use
   $inner_length = @$data;
2. If you want the outer (second) dimension, drop the sub as well: $outer_length = @{$data->[$iwannanowthalengthdude]};

Hope this helps,

Jeroen
"We are not alone"(FZ)