I ride large clips but I'd dig some XLs. I like to get my feet in real deep and get the strap around the arch, right behind the balls of my feet. Keeps everything real tight like. I wear size 11 (US) shoes.

I put one foot in while standing still and cinch down and then get the other in at low speed or even at a standstill. Then just don't take them out. Trackstand through any downtime.

The image comes from John Allen's "Street Smarts".