PowerShell Get-FolderSizes

Get-FolderSizes.ps1

### Sample usage: Get-FolderSizes "C:\data" | sort size -Descending | FT -AutoSize

function Get-FolderSizes([string] $StartFolder) {

    $results = @();
    
    $colItems = (Get-ChildItem $StartFolder | Measure-Object -property length -sum)
    $res = New-Object PSObject | select Folder, Size;
    $res.Folder = $startFolder;
    $res.Size = [float]("{0:N2}" -f ($colItems.sum / 1MB));
    $results += $res;
    
    $colItems = (Get-ChildItem $startFolder -recurse | Where-Object {$_.PSIsContainer -eq $True} | Sort-Object)
    foreach ($i in $colItems)
    {
        $subFolderItems = (Get-ChildItem $i.FullName | Measure-Object -property length -sum -ErrorAction Ignore)
        if($subFolderItems)
        {
            $res = New-Object PSObject | select Folder, Size;
            $res.Folder = $i.FullName;
            $res.Size = [float]("{0:N2}" -f ($subFolderItems.sum / 1MB))
            $results += $res;
        }
    }

    $results;
}