idler pulley bolt

I was driving along in my Chrysler Sebring convertible JXI 1997 and the alternator belt flew off. when I pulled over to take a look it appears that the PS belt also went along with the Idler pulley. I purchased a new idler pulley but the bolt does not come with it. How can I find out what size bolt I need?

your best bet would probably going to your local Advance Auto Parts store and if they have nothing there go to were ever your bought the pulley and see if they have the bolt and last thing i would say would be goto a junk yard.. the idler pulley bolts should all be the same in Dodge and Chrysler vehicles within the same year range.. good luck and sorry that i couldnt be a better help