I just got this keyboard cover (to exactly fit my new keyboard) and don't know how I lived without one of these before. (I bought it after ruining my new-this-year wireless keyboard by eating grapefruit next to it nearly every morning which eventually made some keys closest to the grapefruit spot not work).
It has like flaps with peel-off paper to reveal sticky strips to adhere it to the four edges on the backside of your keyboard. However, since the purpose for me is to remove and clean the clear cover and wash it from time to time, I did not peel off the paper to reveal the sticky strips, but instead simply affixed the four sides to the of the keyboard back with useful painters tape, which we always have around. Long live my new keyboard (its lit! Choose blue, red or purple. Love that.)