Every rug needs a rug pad and kilims are no exception to this rule. The nature of the weave is one in that it creates for a flat rug. As tight as the weave usually is, it is also very flexible if there is no solid pad to keep the rug in place.
Don’t waste time looking for the wrong type of pad for your kilim. Although a few types may work initially, they will not provide the stability that is required. My best choice for rug padding for kilim rugs is a 1/4 of an inch dense needle pinched jute and rubber combination. This specific type of pad does well because the surface, the recycled jute, is textured in order to grab the rug. The bottom consists of a solid, natural layer of rubber that is sewn on to the jute surface. This layer of rubber contains a tread pattern in order to grab to your floor, preventing any sliding. Be careful in selecting the rug pad that has a real rubber backing, not a sprayed on latex rubber that is quite common these days. This costs a little less yet tends to breakdown and harm the floor by the fact that the spray does not hold well enough to the jute surface.
This correct type of padding is important for kilim rugs for a few reasons. First, this pad grabs your rug. This means there will be minimal wrinkling and creeping of your rug. This also helps for vacuuming. The rug pad holds the kilim rug as best as possible allowing for easier vacuuming. Second, due to the nature of the solid rubber backing, there is no movement on hard floor surfaces. So, your kilim rug is held on to the jute surface of this rug pad and the rug pad itself is held on to the floor with the non slip rubber backing.
The best rug pad for kilim rugs is only 1/4 of an inch thick. Anything thicker would not work as well and would not look as well. The thicker ones are not usually as dense as this 1/4 of an inch thick ones and this will create room for movement with your flat rug. Aesthetically, kilim rugs have a flat look and this is their charm. Raising them too high off the floor defeats the beauty of the look and this is not so desirable.
Since kilim rugs are more tribal in nature, they are not perfectly straight and your rug pad should be trimmed about 1 or so inches in from the carpet dimensions on all sides.