So what size is the stock Riser on a 07 Street bob...?

I'm looking to get some risers to raise up an additional 1.5"....
I got 12.5" chubbys on right now, and looking to get a little bit higher, if i had known i would
have gotten the 14's...

 

2 inches from the bottom of the riser to the mid-point of the handle bar

 

And I gotta set of 3.5 inch straight riser ill make you a deal on.