Technical characteristics: Each bag consists of two pockets, and each pocket can hold about 4.5 to 6.8 kg of sand. If you are using sand, you will have almost 20-30 lbs of weight on each corner of your awning. Large size: 17" x 16" (width x height). Easy to use and carry. Top folds down twice to secure velcro straps. Next, fold the two lobes of the bag against each other, compressing them into a solid piece. Then, wrap the velcro strap around the center of this piece horizontally. Finally, tighten the velcro strap, and the strap that goes down the back becomes a handle to carry the bags. - - -