Yo soy 41/2- 5 mexicano y pedí el 8 americano y me quedo Perfecto. If after testing this method and the putty does not keep the top on securely enough, I will use a thin, clean double sided tape, which was suggested by another review. Upon receiving and opening the box it was in I was disgusted with the filthy and ripped up condition of the box. PROS:- HUGE. These are my absolute favorite brand. They do seem to work well for him. Theyre good, the footbed is a single piece of extruded foam. Rack is easy to mount. These are SO cheap in comparison, how can these have the Harlingen name! Thats what I said, quite possibly the very best out there because I know theyre the very best that Ive ever used.