Gmail Maximum Attachment Size Doubled
Gmail May 22nd, 2007 - By HaochiGmail doubled the maximum attachment size limit to 20 MB last week, so now you can send and receive messages up to 20 MB. Well, as Ionut pointed out in his post, “few mail providers will accept a such a big message, so it’s safe to send messages bigger than 10 MB to other Gmail accounts, to Yahoo Mail Plus or to other premium accounts.”
[thanks Yannick :)-]

