Which Anti-Sway Bar

Trying to replace frame mount sway bar bushing but local PH says there is 6 or 7 different sizes. How can I tell which one I have? I have a dial micrometer. Where on the bar would I measure to the get accurate circumference.

we list two:

0.95": http://www.completecherokee.com/prod-1042.htm

1.04" diameter bar: http://www.completecherokee.com/prod-1043.htm

measure the diameter where the current mounts are, or just out from that.

Where the current bushings are