Twitter Background Dimensions

I wanted to re-tweek my twitter profile's background (for my daytime job) recently. I scoured the web for the background dimensions but didn't find one that worked for me. I tested a few sizes and came up with one that worked well.

Dimensions: 1280 px x 800 px, 72 dpi
Branding/design area: Start from 0.2 inches off the left side and end it at 3.7 inches from the left.
Start from 0.2 inches from the top.

I only used the left side of the profile for the designs so you'll have to experiment with the right side, but it probably is around the same dimensions.

Here is the example: twitter.com/weroqq

Remember, how it looks depends on what kind of resolution you set for your screen. If anyone has different ideas, feel free to leave a comment.