Gmail now supports searching by size: http://support.google.com/mail/bin/answer.py?hl=en&answer=7190

The new operators are:

• size: Search for messages larger than the specified size in bytes
• Example: size:1000000
• Meaning: All messages larger than 1MB (1,000,000 bytes) in size.
• larger: and smaller:
  • Similar to size: but allows abbreviations for numbers Example: larger:10M Meaning: All messages of at least 10M bytes (10,000,000 bytes) in size.

You can now search for emails of that size and delete any to free up space.

Gmail now supports searching by size: http://support.google.com/mail/bin/answer.py?hl=en&answer=7190

The new operators are:

• size: — Search for messages larger than the specified size in bytes
• Example: size:1000000
• Meaning: All messages larger than 1MB (1,000,000 bytes) in size.
• larger: and smaller: — Similar to size: but allows abbreviations for numbers
• Example: larger:10M
• Meaning: All messages of at least 10M bytes (10,000,000 bytes) in size.

You can now search for emails of that size and delete any to free up space.