It took less than two minutes to secure this to the roof of the car. Great little spice racks that look really good and function as advertised. I also wish there was a strap in the back for adjustments as well. Not Nike quality that you come to expect. This is a gorgeous pair of racking shelves. 5 but find with Skechers a 7 (us 10) is perfect It does the job, though. I though I had ordered 8 1/2 M but the order states 8 1/2 W, so I will accept that as my error. Im not kidding when I tell you that my three year old wears these every single day. Great Product