Look on the driver's door post.
The correct factory tire size for a 1994 Jeep Wrangler is 215/75R15.
The correct tire size for a 2014 Jeep Wrangler is P225/75R16.
The correct size factory tire size for a 2012 Jeep Wrangler is P225/75R16.
The correct factory tire size for a 1998 Jeep Wrangler is P215/75R15.
The correct factory tire size for a 1993 Jeep Wrangler is 215/75R15.
The correct factory tire size for a 1997 Jeep Wrangler is P205/75R15.
The correct factory tire size for a 1987 Jeep Wrangler is 215/75R15.
The correct factory tire size for a 1999 Jeep Cherokee is 225/70R15.
The correct factory tire size for a 1992 Jeep Wrangler is 215/75R15.
The correct factory tire size for a 2007 Jeep Wrangler is P255/75R17.
The correct factory tire size for a 2014 Jeep Wrangler is 255/75R17.
The spare tire cover needs to match size of tire.