You design your own Twitter backgrounds? Then you surely will want everything to look just right, no matter who views your profile, on any resolution. Here’s a Twitter background template, you can use as a guide:
Back in 2009, Chad Engle had created a background template that worked with the old twitter, now as twitter has changed it’s appearance he is back with a new one. The new template is as simple and easy to follow as the last one. You can use it to design backgrounds that will work perfectly with the new Twitter.
The template includes all the necessary info for you, like the “Twitter container”, and also the reference for all common resolutions possible.
If you don’t like designing backgrounds then you can always use templates to customize new Twitter layout.