Combining get-mailbox with get-mailboxstatistics output

Trying to extract mailboxes that are not using the database defaults and include their name, database and quota information.    That is fine I can get all of that from get-mailbox -

"Get-Mailbox -ResultSize unlimited | where {$_.UseDatabasequotadefaults -ne "true"} | select displayname, database,issuewarningquota,prohibitsendquota"

And pipe to a file.

What I would like to include is the totalitemsize (size of mailbox) include with this which is only available from Get-MailboxStatistics.    How can I include this in my above code ?

Thanks in advance!