Recursive public folder size

I need a bit of help with my code - I want to be able to recursively report the complete size for a public folder and all its child folders.
Here's what I have thus far, but it's currently spitting out results like:
0
0
10
750
0
12
etc...
I'm open to performing this another way, I just want it to match up with what is returned when I right-click on a public folder to get it's size properties...

function Get-PFFolderSizes {  
        param ($FolderPath)
        $Parent = Get-PublicFolder $FolderPath
        $Children = Get-PublicFolder $FolderPath -GetChildren
        
        foreach ($child in $Children) {
            $size = (Get-PublicFolderStatistics $child -Server $PFServer).totalitemsize.value.tokb()
            $ChildSizes += $size
            Get-PFFolderSizes $Child.identity.tostring()
        }
        return $ChildSizes
    }

$totalsize = Get-PFFolderSizes $folderpath

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