"Stopp Filt"..... those crazy Ikea names, eh? anyways... 5.5 ft by 7ft 9 inches slightly "tacky" on one side and "flocked" on the other. cheapest, most useful rug underlay I could find. These are GREAT!!!... they stop the rugs from moving around, are okay on all surfaces, and even add just a bit of a layer under the rug. Easy to cut with scissors to the size you want. purchased way too many for all my area rugs so now have extra.. 4 separate packages - each $12 save the tax save the expense of getting it here. if interested, please email! thanks