They fit perfect right size could go to the radio and answer calls skip songs but I did not find out how to turn the volume up and down had to use my phone to do that by pushing the button that you would think turns the volume up it just changes and skipped the song other that that works great! They fit great in the toe box. We do not have a roof rack - just a normal flat top car. The one thing I can say is that when I first tried these shoes on, I noticed that there were a few places where the insides of the shoes were scratchy. Im a size 12. Theyre only 2-3 months old! There are a few things that stand out about this shoe rack:Height: The overall height and the height between racks. Update: 4 endcaps received! My daughter is in these Uggs for 10-15 hours a day. Das funktioniert problemlos nach dem Einlegen ins Case, keinerlei Kontaktschwierigkeiten.