List Mailbox Sizes in Exchange 2010

Using the Exchange Management Shell it is possible to export a list of Mailbox sizes to a csv file using a very simple command

Get-Mailbox |Get-MailboxStatistics | Sort-Object TotalItemSize -Descending |  select-object DisplayName, {$_.TotalItemSize.Value.ToMB()}  | export-csv -path C:\Temp\MailboxSizes.csv

Once opened up in Excel or any other spreadsheet the data is clearly presented.