Thick vs. thin rug pad - which is better on hardwood?

Thicker rug pads provide more comfort. So, the thicker the rug pad, the more comfortable your rugs will be. Thinner rug pads offer high levels of grip and keep rugs lying flush with floors. With runner, hallway, or small area rugs in high traffic areas, I wouldn't use rug pads thicker than ¼’’ because they will raise the rug too high off the floor.