How To Check Your Outlook Folders & Dimensions

Contents
  1. Reduce the size of Outlook folders by finding the largest emails
  2. Check Outlook folder size
  3. Check your folder sizes in Outlook 2007
  4. Reduce Outlook file size by archiving email
  5. Find the biggest emails in your Outlook folders

Reduce the size of Outlook folders by finding the largest emails

Email processing in Outlook has become slow and cumbersome, is your hard drive shrinking, or are you about to reach the limit of your inbox and suspect emails with attachments are involved? Outlook comes with a tool that shows you how much space each folder takes up. Find out how big your email folders are in Outlook and take action if they’re too big.

The instructions in this article apply to Outlook 2019, 2016, 2013, 2007; and Outlook for Office 365.

Check Outlook folder size

To see the size of your folders in Outlook:

  1. Right click on the folder you want to check the size and select Properties of data files † Select in Outlook 2019 Characteristics

  2. In the dialog box Characteristics select Folder Size

  3. The Folder Size dialog box shows the folder size in kilobytes, as well as a breakdown of all subfolder sizes.

  4. By checking the size of each folder and subfolder, you can determine which account is taking up the most space, as well as subfolders that may contain files that are too large.

Check your folder sizes in Outlook 2007

To see the size of your Outlook 2007 folders:

  1. Select instruments Cleaning up the mailbox

  2. Select Show mailbox size

  3. Select close to (twice) to close the mailbox size display.

Reduce Outlook file size by archiving email

Archiving older or less frequently used messages is an easy way to manage all your Outlook folder and file sizes. Outlook can even do the archiving automatically.

Find the biggest emails in your Outlook folders

To have Outlook collect all the biggest emails it finds in all your folders:

  1. Select text field Search the current mailbox † Or click on Ctrl+E

  2. Go to the tab Search

  3. In a group parameters: select search tools advanced search

  4. In the dialog box advanced search select drop-down arrow Appearance and choose To inform

  5. To find more folders than your Inbox (or whatever folder is currently open in the main Outlook window), select Overview † Check the box next to the folders you want to search and check the box Search subfolder † Select Okay

  6. In the dialog box advanced search go to tab Added options

  7. Select drop-down arrow Size (kilobytes) select Lake and then enter a size (for example, 5000 for folders larger than 5 MB).

  8. Select Find now

  9. Double click on a message to open it and process it as you wish. Or choose remove in search results to delete any message immediately.

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