"However, if you paste in a link that is less than 30 characters, we'll post it in its entirety. If it's longer than 30 characters, we'll convert it to a shorter URL."
Source: http://help.twitter.com/portal
"However, if you paste in a link that is less than 30 characters, we'll post it in its entirety. If it's longer than 30 characters, we'll convert it to a shorter URL."
Source: http://help.twitter.com/portal