First, be careful about comparing data because different companies measure rise and pullback very differently. Some measure with the rise straight up and some measure with the rise at a more normal rake angle. This diference also afects the pullback number because in the straight up method you are just reading the actual angle on the bars while with the raked measurement, the rearward angle of the riser portion is included in the dimension. I am not saying all this because I find it interesting....I just went through a tough time trying to find new bars for my FLSTFI. Anyhow, Harley uses the "straight up" way (which I think is more accurate) of measuring and lists the overall width as 31 inches, the center width (straight part where it clamps to the trees) as 12.5 inches, the rise as 4.5 inches and the pullback as 8.5 inches.
Now, if your real question was where can I get some bars for my Fat Boy that won't give me a neck and back ache.....I switched to Wild1 Chubby bars #504. Wild1 even has a site showing a fat boy with stock vs. the #504 bars. they aren't cheap....an alternative if you want to sit more upright would be to get FLSTC bars for 35 bucks. Or better yet, the Road king Touring bars (harley #56557-95)...they are similar to stock Fat Boys except about 3 inches more rise....and Harley says they are ok to use on Fat Boys.
Anyhow...if all you really wanted was the dimensions...just ignore the other stuff. BTW....it is on the Harley site...just look at a specific bar and there is a link to the chart... or in the parts catalog....lists all the bars in a chart.