Twitter just launched their official Tweet this button – about time … it comes in three versions (110×20, 55×20, 55×63) with five different settings for customization. You can set the URL obviously, the Tweet text default, via @SapientNitro or some user, related, and count box position.

You can embed with an iframe or embed with a JavaScript hosted at Twitter that will style a pre-determined class in a link. Pretty straight forward of course; how much can there really be for a simple Tweet this button.

You can see it server directly from Twitter here .

Step-by-step instructions by Mashable :