Electrical stimulation leads with anchoring unit and electrode arrangement and methods of making and using

An electrical stimulation lead includes a lead body having a distal end portion, a proximal end portion, and a longitudinal length; and electrodes disposed along the distal end portion of the lead body. The electrodes include a first set of electrodes and a second set of electrodes. The electrodes of the first set are spaced apart by a first distance and the electrodes of the second set are spaced apart by a second distance that is greater than the first distance and the first set is spaced apart from the second set by a third distance that is greater than or equal to the second distance. The lead also includes terminals disposed along the proximal end portion of the lead body; conductors electrically coupling the terminals to the electrodes; and anchoring units disposed along the distal end portion of the lead body and proximal to the first set of electrodes.