How to find mailbox size in Microsoft Outlook

Microsoft Outlook users can find the mailbox size using the option available as part of Mailbox Cleanup. If your organization has set quota for Outlook mailbox then you need to make sure you do not exceed the limit. You can do this by periodically checking the mailbox size and do the necessary clean up activity if the mailbox size is about to exceed.

3 simple steps to manage mailbox size

These steps has to be followed either weekly or monthly or quarterly depending upon number of and size of the emails received. List below are steps to find out mailbox size in Outlook 2013, Outlook 2010 and Outlook 2007

Finding mailbox size in Outlook 2016, 2013, 2010 and 2007

Outlook 2016 and 2013

Step 1: Click the File menu and select Info from the menu list.

Cleanup Tools in Outlook 2013

Step 2: Click the Cleanup Tools option under Mailbox Cleanup section in Account Information screen.

Mailbox Cleanup in Outlook 2010 and Outlook 2013

Step 3: Select Mailbox Cleanup from the Cleanup Tools dropdown list.

Mailbox Cleanup

Step 4: In the Mailbox Cleanup window, click the View Mailbox Size option. This would display the following Folder Size window, with the Total Size including the Size of subfolders.

Folder Size in Outlook

Outlook 2010

Outlook 2010 users need to follow the above Step 1 and Step 2. Only the mailbox cleanup window in Outlook 2010 is different from that of Outlook 2013.

Mailbox Cleanup in Outlook 2010

Clicking on View Mailbox Size button will display the Folder size of your Outlook Mailbox.

Folder Size in Outlook 2010

Demo Video – How to find mailbox size in Outlook 2010


Outlook 2007

Mailbox Cleanup in Outlook 2007 can be accessed via the Tools menu.

Mailbox Cleanup in Outlook 2007

This provides various option such as View Mailbox Size, finding items based on date and size, Auto Archive option, Empty Deleted Item and View Conflicts Size

Also See: How to change the send and receive emails settings in Outlook


5 responses to “How to find mailbox size in Microsoft Outlook”

  1. Abel loolo friday Avatar
    Abel loolo friday

    I received a message on my nokia classic that i have won 11,5. 000 pls how can i claim it thanks

  2. Great tip, this change with Outlook 2010, I don’t know why they hid it in cleanup – thanks for the tip.

  3. Craig Avatar

    I would like a button in the Quick Access toolbar as I need to clean out my various folders a couple of times each month when I exceed my allowed mail box size. This was right at the bottom of the Folder List in Outlook 2003, and it should be just as handy in 2010. It is my own bad habits that get me into this trouble, but I doubt that I will change anytime soon.

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