Hash problem

[Afrow UK]

My Hash is like so:

%sizes = (

'1_1w' => '800',
'1_1h' => '536',
'1_2w' => '600',
'1_2h' => '402',
'1_3w' => '400',
'1_3h' => '268'

);

Now, I'm getting these values like so:
foreach $num (@numbers) {
print "$sizes{'$num_1w'}"; etc...
}

But, this is not working.
This does work:
$sizes{'1_1w'}

What is wrong?

Thanks

-Stu

[Afrow UK]

Never mind, I should have been using it like $sizes{$image . '_1w'}

-Stu