Gmail Size Search – Find all Emails with Large Attachments

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Gmail supports an undocumented “size” search operator that you can use to quickly find all the big emails in the mailbox whose size exceeds a particular threshold. The search syntax is:

size:[size in bytes]

To give a real example, a Gmail search query like size:5242880 will list all big emails who size is 5 MB or greater while size:10485760 will list email messages that are bigger than 10 MB.

You may specify the size in MB as well which makes it a lot easier. For instance, size:5MB (or say size:5M) will find all Gmail messages that are 5 MB or greater in size.

Combine the size search operator in Gmail with has:attachment and filename:ext operator and you have all the email messages that have attachments that are of a particular file type.

Gmail Size Search for Large Attachments

size:5mb has:attachment – All emails larger than 5 MB containing file attachments.
size:10mb has:attachment filename:pdf – Emails larger than 10 MB PDF attachments.

In addition to size, you can use search operators like larger, larger_than, smaller and smaller_than to find files of any particular size. A combination of these size search operators is possible too. For instance, the following Gmail search query will find all emails with attachment sizes between 5 MB and 8 MB.

larger_than:5m smaller_than:8M