These bags perfectly fit my Kymco People S250. All you do to attach them is open the seat, hang the bags over the sides, and shut the seat down over the straps. You can velcro them to the sides of the scooter but I have not because they don't move while I'm riding. This makes it very easy to remove them when you don't want to use them. They look great and the price was great! Highly recommended. (Posted on 3/14/2014)