What size belt do you need to bypass the air condtion unit on a sebring?

This would all depend on the year and engine configuration/size. An easy way to figure it out is to take a piece of string or an old belt that is larger than the one you want to put on and cut it once. Then put it on where you want the new belt to go and mark or cut it to the length that it meets up with the one end pulled tight as you can. Make sure that the belt tensioner is run in so that you have plenty of room to tighten the new belt once it is on. Be sure to check out watchtower.org