Super absorbent dressing remains in place best over wounds when one continuous piece is used and anchored on all four edges with at least 1 cm to intact skin surrounding the wound. It is recommended to use a size that accomplishes this goal whenever possible. When a wound is larger than can be accommodated by our largest size 20*40cm, you may use and overlap two or more pieces by up to 1 cm, but observe the overlapped edges at each change of the cover dressing to ensure that they remain in contact. Note that the overlap may cause occlusion of the holes in that area. On larger wound this has no practical implications, but we do not recommend it on smaller wounds.