powershell list file sizes

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Function Format-FileSize()
{
    Param ([int]$size)
    If     ($size -gt 1TB) {[string]::Format("{0:0.00} TB", $size / 1TB)}
    ElseIf ($size -gt 1GB) {[string]::Format("{0:0.00} GB", $size / 1GB)}
    ElseIf ($size -gt 1MB) {[string]::Format("{0:0.00} MB", $size / 1MB)}
    ElseIf ($size -gt 1KB) {[string]::Format("{0:0.00} kB", $size / 1KB)}
    ElseIf ($size -gt 0)   {[string]::Format("{0:0.00} B",  $size)}
    Else                   {""}
}


typical usage to find and list all mov files in directory:

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Get-ChildItem -r . *.mov | Select-Object FullName, @{Name="FileSize";Expression={Format-FileSize($_.Length)}}