Filter Gmail email messages by size

If you need to find large attachments on Gmail quickly, you have a few options at your disposal. You can for instance use the Find Big Email service which automatically goes through all of your emails to sort them by size into groups. The program labels the emails accordingly so that you can quickly display all emails with attachments that are over a certain size.
While that is certainly handy, it means that you have to authorize the service for the operation, something that not all Gmail users may want to do considering that emails often contain important data that no one else should have access to.
Back then I explained how you can use a third party email program like Thunderbird to sort emails by size automatically, which is really helpful in this regard. While you need to install and configure the program first, you can display the sizes manually and without third party help.
Gmail's size parameter

There is however another option that you can use on Gmail's website directly. The undocumented parameter size: enables you to display emails that are larger than the specified size.
Use that together with a keyword, e.g. work, the name of a contact or an email address, and you have a filtering system that is easy to use and at the same time very efficient.
The size needs to be entered in bytes, a few examples are size:1000000 for files larger than 1 Megabyte, size:100000 for files larger than 100 Kilobyte or size:10000000 for attachments larger than 10 Megabyte.
It is technically not fully correct, as one Megabyte is 1048576 Bytes but that would make things more complicated as they should be. Just add keywords, email addresses or names to the search phrase to find the emails that you are looking for.
You may use M to specify Megabytes instead of Bytes. The search term size: 1M would return all emails that have a size of 1 Megabyte or larger.
If you just want a list of the largest emails, use it without added search terms.
Gmail supports operators to define ranges. The queries larger_than and smaller_than can be used in that regard. To display all emails between 1 Megabyte and 10 Megabyte, you'd use larger_than:1M smaller_than:10M.
Overview of size parameters and options on Gmail
- size:xyz -- returns emails that match the selected size in bytes or are larger, e.g. size: 1000000
- size:xyzM -- returns emails that match the selected size in Megabytes or are larger, e.g. size: 4M
- larger_than: xyz -- returns emails that are larger than the selected size in bytes, e.g. larger_than: 1000000
- larger_than: xyzM -- returns emails that are larger than the selected size in Megabytes, e.g. larger_than: 1M
- smaller_than: xyz -- returns emails that are smaller than the selected size in bytes, e.g. smaller_than: 1000000
- smaller_than: xyzM -- returns emails that are smaller than the selected size in Megabytes, e.g. smaller_than: 1M
The size parameter can be really useful for a number of things, for instance to delete large emails to free up space, or to locate a specific email that you know had a large attachment attached to it.


You said that Outlook isn’t your main email client, so which is your main one?
I think its thunderbird
It is Mozilla Thunderbird.
Awesome! This actually solved my problem… what a stupid bug.
If this is the same bug that I’ve encountered, there may be another fix: (1) hover over open Outlook item in Taskbar, cursor up to hover over Outlook window item, and right-click; (2) this should give you Restore / Move / Size / Minimize / Maximize — choose Move or Size; (3) use your cursor keys, going arbitrarily N/S/E/W, to try to move or size the Outlook window back into view. Basically, the app behaves as though it were open in a 0x0 window, or at a location that’s offscreen, and this will frequently work to resize and/or move the window. Don’t forget to close while resized/moved, so that Outlook remembers the size/position for next time.
THANK YOU Claude!!! I could get the main window to launch but could not get any other message window to show on the desktop. You are my hero!!!!
Solved my issue! 6 years later and this is still problem…
Fantastic. Thank you. Size did the trick.
This solved my Outlook problem, too. Thank you. :)
Thank you so much, this started happening to me today and was causing big problems. You are a life saver, I hope I can help you in some way some day.
You are a god – thank you!
thanks a lot…. work like charm.. :-)
Yah…thanks Claude. I’ve been having the same problem and tried all the suggestions…your solution was the answer. It had resized itself to a 0/0 box. Cheers
Excellent post. This had me baffled even trying to accurately describe the problem. This fixed it for me.
Thank you
Thanks a lot for the article. Don’t know why it happenend, don’t know how it got fixed, but it was really annoying and now it works :-)
Thanks a lot. I was facing this issue from past 3 week. I tried everything but no resolution. The issue was happening intermittently and mainly when I was changing the display of screen ( as i use 2 monitors). The only option i had was to do system restore. But thanks to you.
I’ve been tried to sole this problem for 12hours. Your comment about changing the display of screen helped me a lot!! Thanks!!
Thank you…don’t know why this happened but your instructions helped me fix it. Running Windows 10 and office pro 2007
Great tip! Thanks!
Worked for me, too – thank you!!!
It’s Worked for me, too
thank you very much!
I had a similar issue with Outlook 2013 on Windows 10 and this helped me to fix it. Thank you very much!
Thank you so much. Solved!
Considering you published this in 2012, incredible not been debugged by Microsoft.
Thank you again. M
This problem was faced by only one user logging to TS 2008 r2 using outlook 2010.The issue was resolved.
Thanks.
Great tip. Thank you!!!! If it helps, I had to use the Control Key and the arrow keys at the same time to bring my window back into view. Worked like a charm.
Thank you, this worked !!!!
Man, you are a fucking god. Thanks a lot, what an annoying bug!!
Awesome, this post solved the issue. Many thanks!